AP Chemistry--Michalek
26
Unit 7 Atomic Structure and Periodicity
Electron affinity
o The energy change associated with
the addition of an electron to a
gaseous atom
o
Shielding
o The protection of the nucleus by the
electrons
o Across the table no change
o Down the periodic table increase
because more energy levels are added
Nuclear Charge
o The charge of the nucleus
o Increases across and down the
periodic table
Ionization Energy
o The energy required to remove and electron from
a gaseous atom
o