chem unit 4
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- as u go down a group, atomic size...
- increases
- shielding effect?
- decrease in size from left to right is less pronounced from pds towards the bottom
- periodic trend
- as u move across pd. size of cations: decreases, size of anions: decrease
- as you down a group, ionization energy...
- decreases
- cation
-
+ ions (lost electrons)
always smaller than neutral atom from which thye r made; more protons than electrons - as you go across a pd, ionization energy...
- increases
- ionization energy
- amount of energy required to move the most loosely held electron
- anion
-
(- ion) gained electrons
always larger then neutral original atom; more electrons than protons - group trend
-
as u go down a group, size increases
(greater # occupied energy levels) - as you move from left to right acros a pd, atomic size...
- decreases