1. Elements & Compounds

2. ATOM the smallest particle of an element
Elements are the names of atoms

3. Element The name of a specific atom with specific properties
A pure substance that cannot be broken down without extreme measures.

4. Elements: How they are written
Elements are written using their Symbol.
A CAPITOL letter alone: H
Or a Capitol letter and a lower case letter: He

5. Molecule
a particle made of two or more of the same atoms
* A particle made up of two or more same compounds

6. Hydrogen + Chlorine = Hydrochloric Acid
Compounds
2 or more different elements combine to make a new substance.
H + Cl = HCl
Hydrogen + Chlorine = Hydrochloric Acid

7. The new substance is different from both of the original elements.
Na + Cl = NaCl
Sodium + Chlorine = Salt
(a metal) + (a liquid) = Salt

8. Formula: The Element Symbols put together to represent a new substance
Symbol tells the Element Name.
Subscript tells how many of that element.

11. Drawing Compounds
We use circles & lines to draw.

12. Mixture
Two or more of different elements or compounds that DO NOT combine chemically.

13. Diagrams of Mixtures