Question

An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are ______.

Options

• 10

• 26

• 38

• 50

Answer 1

An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are 26.

Explanation:

`sqrt("x"("x" + 2))` = 5.92

⇒ x² + 2x − 35 = 0

∴ x = `(-2 ± sqrt(2^2 - 4 - 35.1))/2`

x = 5

So, total electron is d and s = 5 + 3 = 8

∴ [Ar] 3d⁶ 4s

Atomic number = 26