The Successive Ionization Energies of a Certain Element Are I₁=

Multiple Choice

The successive ionization energies of a certain element are I₁= 589.5 kJ/mol, I₂ =1145 kJ/mol, I₃= 4900 kJ/mol, I₄ = 6500 kJ/mol, and I₅ = 8100 kJ/mol. This pattern of ionization energies suggests that the unknown element is

A) K
B) Si
C) As
D) Ca
E) S