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Chemistry form 4 topical question 2
1.
SULIT
NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 2: THE STRUCTURE OF THE ATOM UJIAN TOPIKAL 2: STRUKTUR ATOM PAPER 1 KERTAS 1 1 Which of the following shows the A To prove that bromine gas is a 6 Which of following shows the correct match of particle for molecule. correct comparison of total kinetic magnesium, sodium chloride and Untuk membuktikan bahawa gas bromin energy of a solid, liquid and gas? ialah molekul. Antara yang berikut, manakah menunjukkan bromine? Antara yang berikut, manakah menunjukkan B To prove that bromine gas reacts perbandingan jumlah tenaga kinetik bagi padanan zarah yang betul bagi magnesium, with air. pepejal, cecair dan gas dengan betul? natrium klorida dan bromin? Untuk membuktikan bahawa gas bromin A solid = liquid = gas bertindak balas dengan udara. pepejal = cecair = gas Atom Molecule Ion C To show that energy changes B solid < liquid > gas Atom Molekul Ion during the reaction. pepejal < cecair > gas A Magnesium Sodium Bromine Untuk menunjukkan perubahan tenaga C solid < liquid < gas semasa tindak balas. pepejal < cecair < gas Magnesium chloride Bromin Natrium D To show that bromine gas D solid = liquid < gas klorida consists of fine and discrete pepejal = cecair < gas particles. B Bromine Magnesium Sodium Untuk menunjukkan gas bromin terdiri 7 Which of the following is not true Bromin Magnesium chloride daripada zarah-zarah yang halus dan about kinetic theory? Natrium diskrit. Antara yang berikut, manakah tidak benar klorida tentang teori kinetik? 4 Diagram 2 shows the arrangement of A Particles of all matters are C Bromine Sodium Magnesium particles of a substance. similar. Bromin chloride Magnesium Rajah 2 menunjukkan susunan zarah bagi Zarah-zarah bagi semua jirim adalah Natrium suatu bahan. sama. klorida B Matter is made up of discrete and tiny particles. D Magnesium Bromine Sodium Jirim terdiri daripada zarah-zarah yang Magnesium Bromin chloride diskrit dan halus. Natrium Diagram 2 Rajah 2 klorida C The particles are always moving What is the process that has and vibrating. occured? Zarah-zarah sentiasa bergerak dan 2 A sodium atom is different from a Apakah proses yang telah berlaku? bergetar. sodium ion because A Condensation D Kinetic energy of particles Atom natrium adalah berbeza daripada ion Kondensasi increases with temperature. natrium kerana B Freezing Tenaga kinetik zarah-zarah meningkat A sodium atom has more protons. Pembekuan dengan suhu. atom natrium mempunyai lebih proton. C Melting B sodium atom has more neutrons. Peleburan 8 Which of the following occurs atom natrium mempunyai lebih neutron. D Sublimation during the melting process? C sodium atom has smaller size. Pemejalwapan Antara yang berikut, manakah berlaku atom natrium mempunyai saiz yang lebih semasa proses peleburan? kecil. 5 Which of the following statements are A Heat energy is released. D sodium atom has more electrons. true about the states of matter of gas? Tenaga haba dibebaskan. atom natrium mempunyai lebih elektron. Antara pernyataan yang berikut, manakah B The volume and shape is fixed. benar tentang keadaan jirim bagi gas? Isi padu dan bentuk adalah tetap. 3 Diagram 1 shows two gas jars that I The particles are very far apart. C The temperature remains are filled with bromine gas and air Zarah-zarah adalah sangat jauh antara constant. satu sama lain. Suhu kekal sama. respectively. II Gases have fixed volume and Rajah 1 menunjukkan dua balang gas yang D The size of the particles masing-masing diisi dengan gas bromin dan shapes. increases. udara. Gas mempunyai isi padu dan bentuk yang Saiz zarah-zarah bertambah. tetap. III The forces of attraction are very 9 Diagram 3 shows a graph of weak. temperature against time for a Daya tarikan adalah sangat lemah. substance. IV The kinetic energy of the Rajah 3 menunjukkan graf suhu melawan particles are very high. masa bagi satu bahan. Tenaga kinetik bagi zarah-zarah adalah sangat tinggi. A I, II and III only I, II dan III sahaja Diagram 1 Rajah 1 B I, II and IV only The cover is then removed. Both the I, II dan IV sahaja gas jars are filled with bromine gas C I, III and IV only after five minutes. What is the I, III dan IV sahaja purpose of this experiment? D II, III and IV only II, III dan IV sahaja Penutup dikeluarkan kemudian. Kedua-dua Diagram 3 Rajah 3 balang gas diisi oleh gas bromin selepas lima minit. Apakah tujuan eksperimen ini? © Navision (M) Sdn. Bhd. (690640-P) 5 SULIT
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NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 2: THE STRUCTURE OF THE ATOM UJIAN TOPIKAL 2: STRUKTUR ATOM PAPER 1 KERTAS 1 At what time does the substance is in Meningkat Meningkat Tiada D At point RS, heat is released to the physical state of solid and liquid perubahan the environment. mixture? Pada titik RS, haba dibebaskan ke Pada masa bilakah bahan berada dalam D Increases Increases Decreases persekitaran. keadaan fizikal campuran pepejal dan Meningkat Meningkat Menurun cecair? 15 The melting point and boiling point A t1 C t3 of substance W are –20°C and 18°C 13 Which of the following is true about B t2 D t4 respectively. Which of the following the kinetic theory of matter? Antara yang berikut, manakah benar tentang statements is true about W at room 10 Diagram 4 is a graph that shows the teori kinetik jirim? temperature? temperature against time for a I The particles often move Takat lebur dan takat didih bagi bahan W sample of lead. randomly. masing-masing ialah –20°C dan 18°C. Rajah 4 ialah satu graf yang menunjukkan Zarah-zarah bergerak dalam gerak-geri Antara pernyataan yang berikut, manakah suhu melawan masa bagi satu sampel secara rawak. benar tentang W pada suhu bilik? plumbum. A It has fixed volume. II The velocity of the particles are Ia mempunyai isi padu yang tetap. the same. Kelajuan zarah-zarah adalah sama. B The particles are vibrating and III Lighter particles move faster than rotating about in their fixed heavier ones. positions. Zarah yang lebih ringan bergerak lebih Zarah-zarah bergetar dan berputar pada laju daripada zarah yang lebih berat. kedudukan tetapnya. IV The higher the temperature, the C The energy content of the higher the kinetic energy. particles is low. Semakin tinggi suhu, semakin tinggi Kandungan tenaga bagi zarah-zarah Diagram 4 Rajah 4 tenaga kinetik. adalah rendah. Which of the labelled points A I, II and III only D The forces of attraction between represent the melting process? I, II dan III sahaja the particles are very weak. Titik berlabel yang manakah mewakili proses B I, II and IV only Daya tarikan antara zarah-zarah adalah peleburan? I, II dan IV sahaja sangat lemah. A W C Y C I, III and IV only 16 Diagram 6 shows a model of atom. B X D Z I, III dan IV sahaja Rajah 6 menunjukkan satu model atom. D II, III and IV only 11 Which of the following takes place II, III dan IV sahaja when bromine gas changes to bromine liquid? 14 Diagram 5 is a graph that shows the Antara yang berikut, manakah berlaku cooling curve for gas X. semasa gas bromin berubah menjadi cecair Rajah 5 ialah satu graf yang menunjukkan bromin? lengkung penyejukan bagi gas X. A Heat energy is absorbed. Diagram 6 Rajah 6 Tenaga haba diserap. Who proposed this model of atom? B The collision frequency increases. Siapakah yang mengemukakan model atom Frekuensi perlanggaran bertambah. itu? C Distance between particles A Ernest Rutherford increases. B Niels Bohr Jarak antara zarah-zarah bertambah. C John Dalton D The size of bromine particles D J. J. Thomson remain the same. Saiz zarah-zarah bromin kekal sama. 17 Table 1 shows the melting and Diagram 5 Rajah 5 boiling points of substances P, Q, R 12 A sample of liquid is heated up. Which of the following statements is and S. Which of the following is true about true? Jadual 1 menunjukkan takat lebur dan takat the velocity, distance and size of its didih bagi bahan P, Q, R dan S. Antara pernyataan yang berikut, manakah particles? benar? Substance Melting Boiling Suatu sampel cecair dipanaskan. Antara A At point PQ, kinetic energy Bahan point/ °C point/ °C yang berikut, manakah benar tentang kelajuan, jarak dan saiz zarah-zarah? increases as temperature Takat lebur / Takat didih / decreases. °C °C Pada titik PQ, tenaga kinetik bertambah Velocity Distance Size apabila suhu menurun. Kelajuan Jarak Saiz P 20 88 B At point QR, all forces of attraction between particles A Increases Decreases No changes Meningkat Menurun Tiada become weak. perubahan Pada titik QR, semua daya tarikan antara Q 50 112 zarah-zarah menjadi lemah. B Decreases Decreases Increases C At point R, all the gas X has Menurun Menurun Meningkat completely melted. R –38 56 Pada titik R, semua gas X telah melebur C Increases Increases No changes keseluruhannya. © Navision (M) Sdn. Bhd. (690640-P) 6 SULIT
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NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 2: THE STRUCTURE OF THE ATOM UJIAN TOPIKAL 2: STRUKTUR ATOM PAPER 1 KERTAS 1 20 B I, II and IV only Y I, II dan IV sahaja S –65 90 10 Simbol atom bagi unsur Y ialah . C I, III and IV only Antara yang berikut, manakah benar tentang I, III dan IV sahaja Table 1 Jadual 1 Y? D II, III and IV only Which of the substances exists as a II, III dan IV sahaja Proton Number Electron solid at room temperature? Bahan yang manakah wujud sebagai pepejal number of configuration 25 Table 2 shows the number of Nombor neutron Susunan pada suhu bilik? proton elektron protons, neutrons and electrons for A P C R Bilangan neutron particles P and Q. B Q D S Jadual 2 menunjukkan bilangan proton, neutron dan elektron bagi zarah P dan zarah Q. A 10 10 2.8 B 10 20 2.8 Particle Proton Neutron Electron Zarah Proton Neutron Elektron C 20 10 2.8.8.2 D 10 10 2.8.8.2 P 17 18 18 18 Element X has 16 electrons and relative atomic mass of 31. Element X possesses 22 Atom X has 18 neutrons and an same chemical properties as the element electron arrangement of 2.8.7. What Q with proton number 17 18 16 is the nucleon number of atom X ? Unsur X mempunyai 16 elektron dan jisim Atom X mempunyai 18 neutron dan susunan atom relatif 31. Unsur X mempunyai sifat elektron 2.8.7. Apakah nombor nukleon bagi Table 2 Jadual 2 kimia yang sama dengan unsur yang atom X? Which of the following statements mempunyai nombor proton A 7 are true about P and Q? A 5 C 24 B 17 Antara pernyataan yang berikut, manakah B 7 D 20 C 18 benar tentang P and Q? D 35 I P and Q are isotopes. 19 Which of the following elements has 23 Diagram 7 represents an atom of an P dan Q ialah isotop. the most neutrons? element X. II P and Q have same melting point. Antara unsur yang berikut, manakah P dan Q mempunyai takat lebur yang Rajah 7 menunjukkan atom bagi unsur X. mempunyai paling banyak neutron? sama. III P and Q are the same elements. 65 32 P dan Q ialah unsur yang sama. A Zn C S 30 16 IV P and Q are positively charged. P dan Q adalah bercas positif. B 40 Ar D 70 Ga 18 31 A I and III only 20 Which of the following diagrams I dan III sahaja shows the same valence electrons B I and IV only arrangement as fluorine? (Proton Diagram 7 Rajah 7 I dan IV sahaja number of F = 9) What is the symbol of element X ? C II and IV only Antara rajah yang berikut, manakah Apakah simbol bagi unsur X? II dan IV sahaja menunjukkan susunan elektron valens yang 27 13 D I, II and III only sama dengan fluorin? (Nombor proton X X 13 27 I, II dan III sahaja Fluorin = 9) A C A C 27 X 14 X 26 The scientist who discovered 14 13 electron is B D Ahli sains yang menemui elektron ialah 24 What can be deduced from the A Ernest Rutherford 35 B John Dalton symbol 17 Cl? C J. J. Thomson B D D James Chadwick Apakah yang boleh ditaakulan daripada simbol Cl? I Chlorine atom has 7 valence 27 Diagram 8 shows the symbol for an electrons. aluminium atom. Atom klorin mempunyai 7 elektron valens. Rajah 8 menunjukkan simbol bagi satu atom II Chlorine atom has 18 neutrons. aluminium. 21 The atomic symbol of element Y is Atom klorin mempunyai 18 neutron. 20 III Chlorine atom has 17 electrons. 10 Y. Which of the following is Atom klorin mempunyai 17 elektron. Diagram 8 Rajah 8 true about Y ? IV Chlorine atom has 2 electron Which of the following is true about shells. aluminium atom? Atom klorin mempunyai 2 petala elektron. Antara yang berikut, manakah benar tentang A I, II and III only atom aluminium? I, II dan III sahaja © Navision (M) Sdn. Bhd. (690640-P) 7 SULIT
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NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 2: THE STRUCTURE OF THE ATOM UJIAN TOPIKAL 2: STRUKTUR ATOM PAPER 1 KERTAS 1 Nombor nukleon A +1 Proton Neutron Nucleon II Chemical properties number number number B +2 Sifat-sifat kimia Nombor Bilangan Nombor C –1 III Melting point D –2 proton neutron nukleon Takat lebur A 27 14 13 IV Number of electrons Bilangan elektron 34 Which of the following isotopes can A I and II only C II and IV only be used to kill cancer cells? B 14 13 27 Antara isotop yang berikut, manakah boleh I dan II sahaja II dan IV sahaja digunakan untuk membunuh sel kanser? C 27 14 13 B II and III only D I and IV only II dan III sahaja I dan IV sahaja D 13 14 27 31 Which of the following isotopes is used to determine the age of 28 Table 3 show the proton number of archaeological artifacts? elements P, Q, R and S. Antara isotop yang berikut, manakah A Carbon-12 C Iodine-13 Jadual 3 menunjukkan nombor proton bagi digunakan untuk menentu usia artifak Karbon-12 Iodin-13 unsur P, Q, R, and S. arkeologi? B Cobalt-60 D Sodium-24 Element A Cobalt-60 Kobalt-60 Natrium-24 P Q R S Kabalt-60 Unsur B Carbon-13 35 Element X has a proton number of Proton number 15 7 10 13 Karbon-13 17. Element Y has an electron Nombor proton C Sodium-24 arrangement of 2.8.8.1. Then, X– ion Table 3 Jadual 3 Natrium-24 D Carbon-14 and Y+ ion have the same Which of the elements are in the Unsur X mempunyai nombor proton 17. Karbon-14 same group in the Periodic Table? Unsur Y mempunyai susunan elektron 2.8.8.1. Unsur yang manakah dalam kumpulan sama Maka, ion X– dan ion Y+ mempunyai sama dalam Jadual Berkala? 32 Element R form R2– ions. R has a A chemical properties A P and Q C Q and R proton number of 8 and a nucleon sifat-sifat kimia P dan Q Q dan R number of 16. Which of the B number of protons B P and R D R and S following is correct about R? bilangan proton P dan R R dan S Unsur R membentuk ion R2–. R mempunyai C number of electrons nombor proton 8 dan nombor nukleon 16. bilangan elektron 29 Element A has a proton number of Antara yang berikut, manakah betul tentang D physical properties R? sifat-sifat fizikal 14. Which of the following have the same properties as element A? Unsur A mempunyai nombor proton 14. Number of Number of Antara yang berikut, manakah mempunyai electron neutrons sifat-sifat yang sama dengan unsur A? Bilangan elektron Bilangan neutron 12 20 A 6W C 10 Y A 8 8 B 19X D 39 Z B 8 10 9 19 C 10 8 D 10 10 30 Carbon has 3 isotopes namely 33 Atom S has proton number of 20 and carbon-12, carbon-13 and carbon-14. forms an ion with electron What are the similarities between arrangement of 2.8.8. What is the these 3 isotopes? charge of ion formed? Karbon mempunyai 3 isotop yang dikenali Atom S mempunyai nombor proton 20 dan sebagai karbon-12, karbon-13, dan karbon- membentuk ion dengan susunan elektron 14. Apakah persamaan antara 3 isotop itu? 2.8.8. Apakah cas bagi ion yang terbentuk? I Nucleon number PAPER 2 KERTAS 2 Section A Bahagian A 1 Diagram 1 shows the experiment to study the changes of Rajah 1 menunjukkan satu eksperimen untuk mengkaji perubahan hablur crystal potassium manganate (VII) in the solid gel. kalium manganat (VII) dalam gel pepejal. © Navision (M) Sdn. Bhd. (690640-P) 8 SULIT
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NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 2: THE STRUCTURE OF THE ATOM UJIAN TOPIKAL 2: STRUKTUR ATOM PAPER 1 KERTAS 1 Huraikan tiga teori kinetik jirim berdasarkan eksperimen ini. ________________________________________________________ [3 marks / 3 markah] (d) What can be done to increase the reaction of this experiment? Apakah yang boleh dilakukan untuk meningkatkan tindak balas eksperimen ini? ________________________________________________________ [1 mark / 1 markah] Diagram 1 Rajah 1 (e) What is the purpose of this experiment? (a) What can be observed after a week? Apakah tujuan eksperimen ini? Apakah yang boleh diperhatikan selepas satu minggu? ________________________________________________________ _____________________________________________ [1 mark / 1 markah] [1 mark / 1 markah] (f) In which state of matter does this rate of process is the (b) State the process involved in the experiment. highest? Why? Nyatakan proses yang terlibat dalam eksperimen ini. Dalam keadaan jirim yang manakah kadar proses adalah paling ________________________________________________________ tinggi? Mengapa? [1 mark / 1 markah] ________________________________________________________ (c) Explain the three kinetic theory of matter based on this [2 marks / 2 markah] experiment. 2 Table 1 shows four atoms W, X, Y and Z. Jika Y dan Z membentuk ion dengan formula Y 2– dan Z3–, tentukan Jadual 1 menunjukkan empat atom, W, X, Y dan Z. bilangan elektron bagi Y2– dan Z3–. Y 2–: _________________ Z3– : __________________ Proton Number of [2 marks / 2 markah] Atom Nucleon number number neutron Atom Nombor nukleon (e) Which of the two atoms are isotopes? Nombor proton Bilangan neutron Dua atom yang manakah ialah isotop? W ________________________________________________________ 13 27 [1 mark / 1 markah] X (f) Why do isotopes of the same elements have the same 15 16 chemical properties? Mengapakah isotop bagi unsur yang sama mempunyai sifat kimia yang sama? Y 16 32 ________________________________________________________ [2 marks / 2 markah] Z 3 Diagram 2 shows the heating curve of napthalene. 17 32 Rajah 2 menunjukkan lengkung pemanasan bagi naftalena. Table 1 Jadual 1 (a) Complete Table 1. Lengkapkan Jadual 1. [2 marks / 2 markah] (b) What is meant by nucleon number? Apakah yang dimaksudkan oleh nombor nukleon? ________________________________________________________ [1 mark / 1 markah] Diagram 2 Rajah 2 (c) Calculate the valence electrons in atom W and X. (a) Name the type of particles that forms napthalene. Namakan jenis zarah yang membentuk naftalena. Hitungkan elektron valens dalam atom W dan atom X. W : ____________________ X : __________________ [2 marks / 2 markah] ________________________________________________________ [1 mark / 1 markah] (d) If Y and Z form ions with the formula of Y2– and Z3–, determine the number of electrons of Y2– and Z3–. © Navision (M) Sdn. Bhd. (690640-P) 9 SULIT
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NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 2: THE STRUCTURE OF THE ATOM UJIAN TOPIKAL 2: STRUKTUR ATOM PAPER 1 KERTAS 1 (b) State the melting temperature of napthalene. Nyatakan suhu peleburan bagi naftalena. __________________________________________________ ________________________________________________________ _ [1 mark / 1 markah] [2 marks / 2 markah] (c) At which point does the napthalene begin to melt? (iv) Name one use of carbon-14 isotope. Pada titik yang manakah, naftalena bermula untuk melebur? Namakan satu kegunaan bagi isotop karbon-14. ________________________________________________________ [1 mark / 1 markah] (d) State the physical state of napthalene at regions AB, BC __________________________________________________ and CD. _ Nyatakan keadaan fizikal naftalena pada kawasan-kawasan AB, BC [1 mark / 1 markah] dan CD. ________________________________________________________ [3 marks / 3 markah] (b) Table 3 shows three elements, Neon, Argon and (e) Explain why there is no change in temperature from Krypton. point B to point C even when heating is continued. Jadual 3 menunjukkan tiga unsur, Neon, Argon dan Krypton. Jelaskan mengapa tiada perubahan suhu dari titik B hingga titik C walaupun pemanasan diteruskan. ________________________________________________________ [3 marks / 3 markah] Table 3 Jadual 3 (i) In which group of the Periodic Table do these (f) State the change of movement of napthalene particles elements located? between point C and point D during the heating process. Dalam kumpulan Jadual Berkala yang manakah unsur-unsur Nyatakan perubahan pergerakan zarah-zarah naftalena antara titik C ini terletak? dan titik D semasa proses pemanasan. ________________________________________________________ [1 mark / 1 markah] __________________________________________________ _ 4 (a) Carbon has two isotopes as shown in Table 2. Karbon mempunyai dua isotop seperti yang ditunjukkan dalam [1 mark / 1 markah] Jadual 2. Atom Proton number Nucleon number SECTION B BAHAGIAN B Atom Nombor proton Nombor nukleon 5 (a) What is the difference between isotopes, isotropy, and 12 C radioactive isotopes? 6 Apakah perbezaan antara isotop, isotropi dan radioaktif isotop? 14 [3 marks / 3 markah] C 6 (b) Name three isotopes of carbon. Table 2 Jadual 2 Namakan tiga isotop bagi karbon. (i) Complete Table 2. [3 mark / 3 markah] Lengkapkan Jadual 2. [2 marks / 2 markah] (ii) State all the three subatomic particles. Nyatakan ketiga-tiga zarah subatom. SECTION C BAHAGIAN C __________________________________________________ _ 6 (a) Define the term ‘matter’. [1 mark / 1 markah] Takrifkan istilah ‘jirim’. (iii) State one similarity and one difference regarding [1 mark / 1 markah] the two isotopes of carbon. (b) State the three physical states of matter. Nyatakan satu persamaan dan satu perbezaan mengenai Nyatakan tiga keadaan fizikal jirim. kedua-dua isotop karbon itu. [1 mark / 1 markah] © Navision (M) Sdn. Bhd. (690640-P) 10 SULIT
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NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 2: THE STRUCTURE OF THE ATOM UJIAN TOPIKAL 2: STRUKTUR ATOM PAPER 1 KERTAS 1 (c) Compare the properties of the three physical states of (c) Explain the physical properties and chemical properties matter based on their of isotopes. Bandingkan sifat ketiga-tiga keadaan fizikal jirim berdasarkan Jelaskan sifat fizikal dan sifat kimia bagi isotop. (i) arrangement of particles, [6 marks / 6 markah] susunan zarah (ii) force of attraction between particles, (d) State four examples of isotopes and their uses in daily daya tarikan antara zarah-zarah, life. (iii) kinetic energy of particles, Nyatakan empat contoh isotop dan kegunaannya dalam kehidupan tenaga kinetik zarah-zarah, harian. (iv) volume and shape. [8 marks / 8 markah] isi padu dan bentuk. [12 marks / 12 markah] (d) Diagram 3 shows a process that takes place in solid, liquid, and gas. Rajah 3 menunjukkan proses yang berlaku dalam pepejal, cecair, dan gas. (ii) Why are these elements not reactive? Mengapakah unsur-unsur ini tidak reaktif? Diagram 3 Rajah 3 __________________________________________________ State the physical process of X, Y and Z. Briefly explain _ the changes in energy for X, Y and Z. [1 mark / 1 markah] Nyatakan proses fizikal X, Y dan Z. Huraikan secara ringkas perubahan tenaga untuk X, Y, dan Z. (iii) Write the electron arrangement for an atom Neon. [6 marks / 6 markah] Tuliskan susunan electron untuk atom Neon. [1 mark / 1 markah] PAPER 3 KERTAS 3 1 An experiment is conducted to determine the melting point of naphthalene. Solid naphthalene is heated in water bath until it melts completely. The initial temperature and the readings of the temperature every 30 seconds are recorded until the naphthalene has melted. Satu eksperimen dijalankan untuk menentukan takat lebur naftalena. Pepejal naftalena dipanaskan di dalam kukus air sehingga ia selesai melebur. Suhu awal dan bacaan suhu setiap 30 saat dicatatkan sehingga naftalena melebur. © Navision (M) Sdn. Bhd. (690640-P) 11 SULIT
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NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 2: THE STRUCTURE OF THE ATOM UJIAN TOPIKAL 2: STRUKTUR ATOM PAPER 1 KERTAS 1 Diagram 1 Rajah 1 Diagram 1 shows the readings of thermometer at 30 (f) What is the purpose of placing the boiling tube in a seconds interval. beaker solid naphthalene is heated directly without The filled with water bath? Rajah 1 menunjukkan bacaan termometer setiap tempoh 30 saat. using water bath Apakah tujuan menempatkan tabung didih ke dalam bikar yang diisi Pepejal naftalena dipanaskan dengan terus tanpa menggunakan (a) Record the readings of temperature in the spaces given dengan air kukus? air kukus. in Diagram 1. [3 marks / 3 markah] Catatkan bacaan suhu pada ruang yang disediakan dalam Rajah 1. [3 marks / 3 markah] (g) (b) Construct a table to record all the data obtained from this experiment. Bina satu jadual untuk mencatatkan semua data yang diperolehi daripada eksperimen ini. Predict what will be observed based on the statement above. [3 marks / 3 markah] Ramalkan apa yang akan diperhatikan berdasarkan pernyataan di atas. [3 marks / 3 markah] (c) (i) Draw a graph of temperature against time for the heating of naphthalene by using graph paper. (h) Give the operational definition for the melting point. Lukiskan satu graf suhu melawan masa bagi pemanasan naftalena dengan menggunakan kertas graf. Beri definisi secara operasi bagi takat lebur. [3 marks / 3 markah] [3 marks / 3 markah] (ii) Based on graph in (c) (i), determine the melting Naphthalene, tetrachloromethane, methanol, point of naphthalene. Show on graph how you zinc (II) sulphate, magnesium chloride, lead (II) (i) bromide. determine this melting point. Naftalena, tetraklorometana, metanol, zink (II) sulfat, Berdasarkan graf di (c) (i), tentukan takat lebur naftalena. magnesium klorida, plumbum (II) bromida. Tunjukkan pada graf bagaimana anda menentukan takat lebur ini. [3 marks / 3 markah] Classify the covalent or ionic compounds above and complete the table below. (d) (i) The temperature of naphthalene remains constant Kelaskan sebatian kovalen atau ion di atas dan lengkapkan from the 120th second until the 180th second jadual di bawah. during heating process. Explain why. Suhu naftalena tetap malar dari saat ke-120 hingga saat ke- Covalent compound Ionic compound 180 apabila proses pemanasan. Terangkan kenapa. Sebatian kovalen Sebatian ion [3 marks / 3 markah] (ii) Write the physical state of naphthalene at the 210th second. Tuliskan keadaan fizikal bagi naftalena pada saat ke-210. [3 marks / 3 markah] (e) Predict the melting point of naphthalene if the naphthalene used is not pure. Ramalkan takat lebur naftalena jika naftalena yang digunakan adalah tidak tulen. [3 marks / 3 markah] [3 marks / 3 markah] © Navision (M) Sdn. Bhd. (690640-P) 12 SULIT
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