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Question

Chemistry Question on Electronic Configurations Of Elements And The Periodic Table

Which of the following does not have valence electron in 3d3d-subshell?

A

Fe (III)

B

Mn (II)

C

Cr (I)

D

P (0)

Answer

P (0)

Explanation

Solution

Phosphorus (P)(P) has electronic configuration
1s2,2s2,2p6.3s2,3p31 s^{2}, 2 s^{2}, 2 p^{6} .3 s^{2}, 3 p^{3}
Therefore, no valence electron is present in the 3d3d-subshell.
Fe(III)Fe (III) has electronic configuration : 3d54s03 d ^{5} 4 s ^{0}
Cr(I):3d545∘Cr(I): 3 d^{5} 45^{\circ}
Mn(II):3d54s0Mn (II) : 3 d ^{5} 4 s ^{0}