Question
HLPaper 1A
Which statement explains why the second ionization energy of aluminium is higher than the first ionization energy of magnesium?
A
Ionization energy increases along period 3.
B
3p electrons are at a higher energy level than 3s electrons.
C
3p electrons are further away from the nucleus than 2p electrons.
D
Aluminium has one more proton and the difference in electron shielding is negligible.