Question

please help to solve this question and please answer in steps

Answer 1

The number of electrons in d-subshell is 5.

Answer 2

Magnetic Moment =
$\sqrt{x(x + 2)}$
where x = number of unpaired electrons.

Using the above formula we get
${x}^{2} + 2x - 35 = 0$
Solving the equation we get
$x = 5$
Thus the unpaired electrons are 5.
The number of Electrons in d orbital of the element will be equal to 8