Give Reason.
Second ionisation enthalpy of copper is exceptionally high.

Give reason (one each) for the following : Second ionisation enthalpy of copper is very high.

Give reason (one each) for the following. a) Transition metals are good catalytic agents. b) Second ionisation Enthalpy of copper is very high. c) The spin only magnetic moment of Sc^(3+) is zero (Z = 21) .

Give reason (one each) for the following: (a) Transition metals are good catalytic agent (b) Second ionisation enthalpy of copper is very high. (c) The spin only magnetic moment of Sc^(3+) is zero (Z = 21).

Give reason : (i) Most of the transition metals have high melting point and boiling point (ii) 2^(nd) ionization enthalpy of Cu is exceptionally high. (iii) atomic size of 4d- and 5d-series elements are almost the same.

Ionisation enthalpy is lowest for:

Give reasons: Third ionisation enthalpy of manganese is unusually high.

The boiling point of water is exceptionally high because

The second electron gain enthalpy of oxygen is

Explain ionisation enthalpy of group 14 elements .