1. Reteach concepts from Unit 1
Protons Identify
Reteach concepts from Unit 1

2. Protons
If you need to identify an element, all you need to know is how many protons it has, everything else in question is a distractor
How do you know how many protons:
Count positive charges
Atomic number
Number of electrons in a neutral atom

3. Why are protons and electrons equal?
Atoms are neutral, or have no charge, until a chemical reaction takes place
On a test, the atoms are assumed to be neutral
The positive charges must equal the negative charges, protons = electrons

4. What is more reactive?
An atom with one valence electron or an atom with 4 valence electrons?
One is easier to get rid of
An atom with one valence electron or an atom with 8 valence electrons?
Atoms with 8 are stable and not reactive

5. If you know the following:
Can you identify this element ALWAYS?
When you know the protons?
When you know the electrons?
When you know the electrons in a neutral atom?
When you know the neutrons?