| A | B |
|---|
| proton | positively charged sub-atomic particle |
| neutron | neutral sub-atomic particle |
| electron | negatively charged sub-atomic particle |
| neutral | overall charge of an atom |
| equal | number of protons and electrons |
| positive | charge of the nucleus |
| atom | building blocks of matter |
| electron cloud | space outside the nucleus / most volume |
| positive | charge of the nucleus |
| negative | charge of the electron cloud |
