Question

What is the atomic number of the element which has $3d^6$ as the outermost configuration?

• A. 12
• B. 32
• C. 26
• D. 24

Answer 1

The correct option is C 26

An element with $3d^6$ configuration should have all the inner orbitals filled. Thus the complete electronic configuration will become: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^6$

total number of electrons are: 2+2+6+2+6+2+6=26

thus atomic number of the element with $3d^6$ outer configuration is 26.