A) Fe
B) Sc
C) V
D) Cr
Correct Answer: D
Solution :
Strength of metallic bonds depends upon number of unpaired electrons. As number of unpaired electrons increases, the bond strength .increases. So Cr, Mo, W show stronger bonding due to maximum number of unpaired electrons. (a) \[Fe=3{{d}^{6}}4{{s}^{2}}=4\] unpaired electrons (b) \[Sc=3{{d}^{1}}4{{s}^{2}}=1\] unpaired electron (c) \[V=3{{d}^{3}}\text{ }4{{s}^{2}}=3\] unpaired electrons (d) \[Cr=3{{d}^{5}}\,4{{s}^{1}}=6\]unpaired electrons Hence, Cr has six unpaired electrons so, it is strongest metallic.
You need to login to perform this action.
You will be redirected in
3 sec
