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1. Chemistry

2. What is chemistry?
Study of the properties of matter and how they change
What is matter?
Anything that has mass and takes up space

3. Structure of an Atom

4. Elements on the Periodic Table
• Atomic Mass
– Average mass of elements atom
• Atomic Number
– Number of protons in the nucleus
• Symbol
– Letter (s) used to represent the element
• Group
– Columns of elements
• Period
– Rows of elements

5. Drawing an Atomic Model

6. What is a compound?

7. How do you find the Molecular
Weight of a compound?

8. Electron Dot Diagrams

9. 3 States of Matter

10. 4 state - Plasma
th
State of matter found at extreme conditions. Matter found on the sun is
in this state.
Gas-like mixture of free electrons and atoms stripped of electrons
examples: man-made
That found in plasma displays and TVs
Inside fluorescent lamps (low energy lighting),
neon signs
Rocket exhaust
natural
Lightning
The ionosphere
The Northern Lights
fire

11. Types of Matter
Mixture
a combination of two or more substances that are NOT
chemically combined
Pure Substance
a single kind of matter that has a specific make-up

12. Isotopes
When an element has a different number of neutrons

13. Carbon Isotopes

14. Who was Mendeleev?
Russian scientist who recognized a
pattern with the elements.
Created the Periodic Table.

15. • Alkali Metals
– Very reactive and do not occur freely in nature
– Explode when exposed to water
– Conduct electricity
• Alkaline Earth Metals
– Very reactive and do not occur freely in nature
• Transition Metals
– ductile and malleable, and conduct electricity and heat
– iron, cobalt, and nickel, are the only elements known to produce
a magnetic field.
• Other Metals
– ductile and malleable
– variable oxidation states

16. • Non-Metal
– are very brittle
– no metallic luster, and do not reflect light
• Halogen
– called "salts".
– Exist at room temp as the 3 states
» Solid- Iodine, Astatine
» Liquid- Bromine
» Gas- Fluorine, Chlorine
• Noble Gas
– Most stable elements