Question 1
The successive ionization energies of a certain element are
I1 = 577.9 kJ/mol,
I2 = 1820 kJ/mol,
I3= 2750 kJ/mol,
I4 = 11,600 kJ/mol, and
I5 = 14,800 kJ/mol. This pattern of ionization energies suggests that the unknown element is
◦ K
◦ Al
◦ Cl
◦ Se
◦ Kr
Question 2
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
◦ K
◦ Si
◦ As
◦ Ca
◦ S