Which among the following is/are correct about chromium ?

Options

A. Its electronic configuration is `3d^4 4s^1`
B. Total spin of chromium =3
C. Spin multiplicity of 3d-subshell of chromium = 6
D. Magnetic moment of chromium is `sqrt(48)`

Answer

A, B, C, D

Explanation

`Cr_(24) to 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 2s^1`
Total spin = Number of unpaired
electron `xx 1/2 = 6 xx 1/2 = 3`
Spin multiplicity
`= (2sum s+1) = 2 xx 5 xx 1/2 + 1= 6`
Magnetic moment `=sqrt(n(n+2))`
where n= number of unpaired electrons.
`=sqrt(6xx8) = sqrt(48) ` B.M.