Question

The first ionisation enthalpy of chlorine atom is 1250 kJ/mol. State which of the following value would be more likely the ionisation enthalpy for the iodine atom? Explain.
A) 1000 kJ/mol
B) 1400 kJ/mol

Answer 1

Answer:

Ionization enthalpy decreases across a group . Iodine is below chlorine in accordance with the periodic table. So iodine must have lesser ionization energy than chlorine . There fore it must be A)1000K/Jmol