Question

What is the total number of unpaired electrons in observed configuration of elements present at group-11 and period-4 in periodic table?

Options

• 1

• 3

• 4

• 7

Answer 1

1

Explanation:

Copper (Z = 29) is placed at group 11 and period 4 in the periodic table.

Electronic configuration of \[\ce{Cu = [Ar] 3d^10 4S^1}\]

No. of unpaired electrons = 1