The ionization energy of boron is less than that of beryllium because :
CHEMISTRY · Single correct · A Level · Chemistry · Periodicity and periodic trends · Periodicity and periodic trends
Problem
The ionization energy of boron is less than that of beryllium because :
(1) beryllium has a higher nuclear charge than boron
(2) beryllium has a lower nuclear charge than boron
(3) the outermost electron in boron occupies a 2p-orbital
(4) the 2s and 2p-orbitals of boron are degenerate