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Write down the electronic configuration of:

(i) Cr+3 (ii) Pm+3 

The electronic configuration of the given elements in their respective oxidation states are:

(i) Cr+3 : 1s2 2s2 2p6 3s2 3p6 3d3

Or, [Ar]18 3d3

(ii) Pm+3 : 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f4

Or, [Xe]54 4f4