Periodic Trends

Ionization energy _________ as you go down the periodic able.

Ionization energy _________ as you go down the periodic able.

Decreases

Electronegativity _________ as you go down the periodic table

Decreases

Atomic radius _______ as you go down the periodic table

Increases

Electronegativity _________ as you go across the periodic table

Increases

Ionization energy _________ as you go across the periodic table

Increases

Atomic Radius __________ as you go across the periodic table

Decreases

size of atom

Atomic Radius

inner levels blocking hole of nucleus from outer level

Electron Shielding

energy needed to pull e from outer level

ionization energy

ability of an atom to pull electrons from other atom

electronegativity

Electron shielding _________ as you go down the periodic table.

Increases

Electron shielding _________ as you go across the periodic table.

stays the same

Ionization energy increases going across because

the e- is held on tighter so it takes more energy to remove

Ionization energy decreases going down because

more shield so the e- is further out of pull

Atomic radius decreases going across because

more pull on e- because there are more e- compressing radius

Atomic radius increases going down because

more levels

Electron shielding increases going down because

more inner levels

Electron shielding stays the same going across because

no new levels

Electronegativity decreases going down because

larger radius so more shields blocking pull of nuc

Electronegativity increases going across because

smaller radius so nuc can see better