| A | B |
|---|
| subatomic particle with positive charge | proton |
| subatomic particle with negative charge | electron |
| subatomic particles with electrical charge | protons and electrons |
| formula for "net charge" of atomic particles | protons - electrons |
| subatomic particles with mass | protons and neutrons |
| formula for "atomic mass" of atomic particles | protons + neutrons |
| protons and neutrons | subatomic particles found in nucleus |
| electrons | subatomic particles found in orbitals or shells |
| number of protons | atomic number of an element |
| vertical (up and down) columns of periodic table | groups of the periodic table |
| horizontal (side-to-side) rows of periodic table | periods of the periodic table |
| name for "group 1" of periodic table | alkali metals |
| name for "group 2" of periodic table | alkali earth metals |
| name for "group 17" of periodic table | halogens |
| name for "group 18" of periodic table | noble gases |
| name for any charged atomic particle | ion |
| name for any "+" atomic particle | cation |
| name for any "-" atomic particle | anion |
| anion | atomic particle with more "e-" than "p+" |
| cation | atomic particle with less "e-" than "p+" |
| isotopes | 2 particles; same "p+"; different "n" |
