| A | B |
|---|
| atom | basic building block of all matter |
| neutron | Neutral charge, found in the nucleus |
| proton | Positive charge, found in the nucleus |
| electron | Negative charge, orbits the nucleus |
| chemical symbol | Letter or letters that are used to abbreviate the names of all the elements |
| Atomic Number | Number of protons found in the nucleus |
| Atomic Mass | Total mass of the atom, found by adding the number of protons and neutrons |
| Number of electrons | Equal to the number of protons in a neutral atom |
| Number of neutrons | Equal to atomic mass minus atomic number |
