MCQ
How many unpaired electrons are present in cobalt $[Co]$ metal
- A$2$
- ✓$3$
- C$4$
- D$7$
✓
Answer
Correct option: B.
$3$
b
(b) $C{o_{27}} = [Ar]\,\,3{d^7}4{s^2}$
(b) $C{o_{27}} = [Ar]\,\,3{d^7}4{s^2}$
$3$ unpaired electron are present in cobalt metal.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following solutions will have $pH$ close to $1.0$
→Correct statement about product is
Point out in which of the following properties oxygen differs from the rest of the members of its family (Group - $VI-A$)
→Consider following solutions
→$(I)$ $1\, M$ glucose $(aq.)$
$(II)$ $1\, M$ sodium chloride $(aq.)$
$(III)$ $1\, M$ acetic acid in benzene
$(IV)$ $1\, M$ ammonium phosphate $(aq.)$
Correct statement regarding to $H-$ spectrum is
→Identify the incorrect statement with respect to ozone
The essential condition for the feasibility of a reaction is that
The telluric helix was given by
Which one of the following is most reactive towards electrophilic reagent ?
A sugar, that is not a disaccharide, among the following is