\(Cr = 1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}4{s^1}\)
\(Mn = 1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}4{s^2}\)
\(Fe = 1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^6}4{s^2}\)
In second ionization enthalpy \(C{r^ + }\) has exact half filled \(d-\) sub shell.
............ $BM$ છે (નજીકનો પૂણાંક)
(આપેલ : પરમાણુ ક્માંક $\mathrm{V}=23, \mathrm{Mn}=25, \mathrm{Cr}=24$ )