8- Place the following in order of decreasing metallic character P As.docx

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8. Place the following in order of decreasing metallic character P As K a. P > As > K b. As > P>K c. K> P> As d. As > K> P e. K > As > P 9. How many of the following elements have 2 unpaired electrons in the ground state? C a. 1 b. 2 c. 3 d. 4 SZ Si 10. Describe the reaction of the alkali metals with non-metals. a. mild reaction b. vigorous c. inert d. forms water e. dissolves 11. Identify a characteristic of halogens. a. powerful oxidizing agents b. forms water in reactions c. powerful reducing agents d. absorbs water in reactions e. inert 12. Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle) to the Ne atom. e. n 3,1-2, m- 1, ms Solution 8) d. As>K>P 9) d. 4 10) b. vigorous 11) a. powerful oxidizing agents 12) d. n=2,l=1,ml=1,ms=-0.5 .

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7. (6) Describe the interference pattern produced by light going through two slits one photon at a time as it might be recorded by photographic film. Discuss how this helps interpret the dual nature of light and how it relates to the wave function of the photon. Solution Interference is phenomenon where the rearrangement of light has been done or in other words the combination of different wave to produce resultant wave. If both the wave are in phase then it will add up and produce the bright fringe or if they are in different phase then they will cancel each other and lead to prroduce dark fringe. Initially in ray optics we have considered the light has nature of ray that means light move in straight direction but when we have seen the phenomenon of interference we come to know that light has small particle known as photon which travels in the form of wave. That means light has wave nature whcih is othe nature of light. .

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6/14/2018 1159 PM 60.2/100 Gradeboo -Print Calculator Periodic Table Question 45 of 55 Sapling Learning Map At 25 ?, how many dissociated OH ions are there in 1 267 mL of an aqueous solution whose pH is 2.08? Number ions O Previous Give Up & View Solution Check Answer Next x to search ? Solution use: pH = -log [H+] 2.08 = -log [H+] [H+] = 8.318*10^-3 M use: [OH-] = Kw/[H+] Kw is dissociation constant of water whose value is 1.0*10^-14 at 25 oC [OH-] = (1.0*10^-14)/[H+] [OH-] = (1.0*10^-14)/(8.318*10^-3) [OH-] = 1.202*10^-12 M number of mol of OH- = [OH-] * volume in L = 1.202*10^-12 M * 1.267 L = 1.523*10^-12 mol number of OH- = number of mol * Avogadroâ€™s number = 1.523*10^-12 mol * 6.022*10^23 ions/mol = 9.17*10^11 ions Answer: 9.17*10^11 ions .

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802.11 networks are identified by which of the following? A. Security identifier (SID) B. Broadcast name C. Kismet D. Service set identifier (SSID) Solution Answer: D. Service set identifier (SSID) SSID is nothing but a network name that identifies the wireless networks. It is a case sensitive and it should be a 32 alphanumeric characters unique number that can be used to pass the header of the packets that are sent over the wireless networks. Multiple SSID can also be existed. By using Multiple SSID we can connect different networks thorugh a single access point. The network manager will take care of managing different SSIDs over the multiple wireless networks. .

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8. Super Mario is attempting to high jump from a pipe on to a set of bricks at 2.44m. At the instant of takeoff, his vertical velocity is 4.0 m/s and his center of gravity is 1.25m high 4.0 m/s What is Mario\'s vertical acceleration at the instant of takeoff? a. 9.81 m/s (downward) How much time elapses after takeoff until Mario reaches his peak height? b. 0.41 s c. What peak height does Mario\'s center of gravity achieve?P Solution here, h0 = 2.44 m initial vetical velocity , v0 = 4 m/s a) the Mario\'s vertical accelration , g = 9.81 m/s^2 b) the time elapsed , t = v0 /g t = 4 /9.81 = 0.41 s c) the peak height , h = 1.25 + v0^2 /2g h = 1.25 + 4^2 /(2 * 9.81) h = 2.07 m .

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8. Multiprocessing with a single core processor is ________________. 9. The log file records every transaction that requires a ______ access to the file system? Solution 8. Multiprocessing with a single core processor is Multitasking . in single core processor when more then one processes are running together then it is called multitasking and this is accomplished by the use of cpu scheduling techniques like (first come first serve)fcfs,(shortest job first)sjf,(shortest remaining time first)srtf. 9. The log file records every transaction that requires a direct access to the file system. log file is the file used to store the log or information about each transaction which can be later used fo file system crashes or reboot or system restore etc .

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8. Identily cach of the following as a strong acid, a weak acid, a basc, a soluble ionic compound, or an insoluble ionic compound in water (a) HNO (c) CH COOH (e) ZnS (f) Fe(NO-):6H O (g) NHs (h)NaCI GNaHCO Solution (a) HNO3, Nitric acid - Strong acid (b) LiOH, Lithium hydroxide - Strong base (c) CH3COOH, Acetic acid - Weak acid (d) H2SO4, Sulphuric acid - Strong acid (e) ZnS, Zinc sulphide - Insoluble ionic compound (f) Fe(NO3)2.6H2O, Iron(II) nitrate hexahydrate - Soluble ionic compound (g) NH3, Ammonia - Weak base (h) NaCl, Sodium chloride - Soluble ionic compound (i) Fe2O3, Iron(III) oxide - Insoluble ionic compound (j) NaHCO3, Sodium bicarbonate - Soluble ionic compound (Weak base) .

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