| A | B |
|---|
| proton | positive charged particle |
| neutron | particle with no charge |
| electron | negatively charged particle |
| electron | smallest particle in the atom |
| nucleus | where you will find the protons and the neutron |
| where you will find the electrons | outside the nucleus |
| AMU | atomic mass unit |
| +1 | the charge on a proton |
| -1 | the charge on an electron |
| 0 | the charge on a neutron |
| atomic number | the number of protons in an atom |
| atomic mass | the number of protons and neutrons in an atom |
| atomic mass - atomic number | no of neutrons |
| The number of electrons | is the same as the number of protons |
