| What happens | trend (increases/decreases/constant) |
| to the ionization energy as you go down a group? | |
| to the electronegativity as you go left to right across a period? | |
| to the atomic radius as you go down a group? | |
| to the electronegativity as you go down a group? | |
| to the number of occupied energy levels as you go down a group? | |
| to the metallic properties as you go left to right across a period? | |
| to the atomic radius as you go left to right across a period? | |
| | What happens | trend (increases/decreases/constant) |
| to the atomic mass as you go left to right across a period? | |
| to the metallic properties as you go down a group? | |
| to the ionization energy as you go left to right across a period? | |
| to the atomic mass as you go down a group? | |
| to the number of valence electrons as you go down a group? | |
| to the number of valence electrons as you go left to right across a period? | |
| to the number of occupied energy levels as you go left to right across a period? | |
|