1. Chemistry Basics
Elements and Atoms

2. Element vs. Compound Elements = symbol, Compound = Formula
Element - Simplest form of matter
Examples: C, Al, Mg, Au, Na, etc
Compound: More than one element chemically combined in a fixed proportion
Example: NaCl, H2O, K3N
Elements = symbol, Compound = Formula

3. A Little Chemistry… CO2(g) means… H2O(s) means… C6H12O6 means…
NaCl(aq) means…

4. More Important Information
**Compounds can be broken down chemically, elements can’t.
Elements can not be broken down
Compounds have different chemical properties than their component elements

5. You Try… Identify the following as an element or compound. WHY? CH4 COK
NaClO Cl
CaCl2

6. Elements of Life
Sulfur, Phosphorus, Oxygen, Nitrogen, Carbon, and Hydrogen are the “elements of life”
“SPONCH”
Living organisms are made of combinations of these elements

7. More Chemistry
Periodic Table Basics

8. Subatomic Particles
Protons: positive, located in the nucleus, determines the atomic number (location on the periodic table)
Neutrons: neutral, located in the nucleus
Electrons: negative, located surrounding the nucleus, changes the charge of an atom (ion)

9. Periodic Table
When elements are arranged in increasing atomic number (same as the number of protons), a pattern shows up.

10. Group/family: a vertical column Period: a horizontal row

11. Periodic Table Basics
3 major categories: METALS NONMETALS METALLOIDS