| A | B |
|---|
| the atomic number equals the | number of protons |
| the mass number equals the | number of protons and neutrons added together |
| What is an ion? | something that has protons and electrons that are the same # |
| What kind of charge do atoms have? | neutral |
| what kind of charge do protons have? | positive |
| what kind of charge to electrons have? | negative |
| electron + charge = | proton # |
| mass# + proton# = | neutron # |
| mass# - proton# = | electron # |
| charge + electron# = | proton # |
| How do you find the valience electron# ? | count over from the first element in 1st row |
