| A | B |
|---|
| Atomic Radius decreases | left to right across a row/period |
| atomic radius increases | top to bottom down a group/family |
| atomic radius of Li ___ (</>)Na | < |
| atomic radius of Be ___ (</>) B | > |
| atomic radius definition | distance from nucleus to valence electrons |
| group 1 has a _____ (bigger/smaller) atomic radius than group 8 | bigger |
| period 2 has a _____ (bigger/smaller) atomic radius than period 6 | smaller |
| changes as you move from left to right across the PT | # of protons/# of valence electrons |
| remains the same as you move from left to right across the PT | # of core electrons/# of energy levels |
| changes as you move from top to bottom down the PT | # of protons/# of energy levels |
| remains the same as you move from top to bottom down the PT | # of core electrons/# of valence electrons |
| protons & electrons (opposites) ___ each other | attract |
| electrons & electrons (likes) ____ each other | repel |
| smaller radius = ___ (more/less) attraction between protons & electrons | more |
| protons in the nucleus attract the ______ | electrons |
| less protons = ___ (more/less) Zeff | less |
| as you move down a group, electron shielding _____ | increases |
| as you move across a period, atomic radius ___ | decreases |
| is Zeff more important for periods or groups? | periods |
| is shielding more important for periods or groups? | groups |
