4f^(14)" configuration is observed in "

4f^(14) configuratoin is observed in

Outer shell 'octet' configuration is observed for the elements of the group

Which electronic configuration is not observing the (n + l) rule.

Europium (Eu) and Terbium (Tb) attain stable 4f^(7) configuration by exhibiting oxidation states of

Europium (Eu) and Terbium (Tb) attain stable 4f^(7) configuration by exhibiting oxidation states of

In the followin electronic configuration, ns^(2)(n-1)d^(0-1)(n-2)f^(1-14) If value of (n-1)=5 the configuration will be of :-