Question

Draw the ground-state electronic configuration for each of the following:

a. Mg

b.Ca²⁺

c. Ar

d. Mg²⁺

Short answer

a. 1s²2s²2p⁶3s²

b.1s²2s²2p⁶3s² 3p⁶

c.1s²2s²2p⁶3s² 3p⁶

d.1s²2s²2p⁶

Step-by-step solution

Write down the electronic configuration

a. 1s²2s²2p⁶3s²

b.1s²2s²2p⁶3s² 3p⁶

c.1s²2s²2p⁶3s² 3p⁶

d.1s²2s²2p⁶

write down the ground state electronic configuration.

Follow the Hunds rule to fill up the orbitals.

Hunds rule states that every orbital in a subshell is first occupied singly having the same spin before it is doubly occupied.

a. Mg

1s²2s²2p⁶3s²

Ground state electronic configuartion :

b. Ca²⁺

1s²2s²2p⁶3s² 3p⁶

Ground state electronic configuration:

c. Ar

1s²2s²2p⁶3s² 3p⁶

Ground state electronic configuration:

d. Mg²⁺

1s²2s²2p⁶

Ground state electronic configuration: