From amongst the following, choose the element with the lowest IE: Be, B and C.
Boron (B) has lowest Ionization energy.
Among the elements Li, K, Ca, S and Kr, which one has the highest first ionisation enthalpy and which one has the lowest first ionisation enthalpy?
For each of the following pairs state which one has greater ionisation enthalpy:
(i) I, I- (ii) Br, K.