a) Find the electronic configuration of Mo. (2)
b) For transition elements, why does the ionization enthalpy tend to increase along the
series only slightly as compared to the main group elements?
A) Atomic Structure of Molybdenum
1s2 2s2p6 3s2p6d10 4s2p6d5 5s.
B) The ionization energy increases due to the increase in the nuclear charge with an atomic number at the beginning of the series. Gradually, the shielding effect of the added electrons also increases. This shielding effect tends to decrease the attraction due to the nuclear charge.