8.2/8.3: Trends for Atomic Size, Ionization, and Electron Affinity

atomic size increases as n increases (True or false)

true

atomic size decreases/increases as Z_eff increases

decreases

for main group elements, atomic size decreases/increases down a group in the periodic table and decreases/increases across a period

increases; decreases

what is ionization energy (IE)

how much energy is needed to remove an electron form an atom

atoms with low IE tend to form cations/anions

cations

atoms with high IE tend to form cations/anions

anions

Draw and tell trend of IE

decreases down a group, increases across a period

does it take more energy to remove core electrons than valence electrons

yes

what is electron affinity (EA)

how likely an atom would accept an electrons

what does the # of low EA look like

it is closer to 0 or positive

low EA means electrons is less/more likely to accept an atom

less

high EA means electrons is less/more likely to accept an atom

more

what does the # of high EA look like

very negative number

Atoms with low EA tend to form cations/anions

cations

Atoms with high EA tend to form cations/anions

anions

draw and tell trend for atomic size

increases from right to left, increases down a group

draw and tell trend for electron affinity

not really a trend, has many exceptions. increases up a group, increase from left to right