Question

What is the electronic configuration of calcium

Answer 1

calcium atom =2,8,8,2

Answer 2

Answer:

The M shell (aka 3rd principle quantum shell) has the orbitals 3s, 3p and 3d. These three orbitals have a maximum capacity of 18 electrons.

Explanation:

However, calcium does not have that many electrons to fill the 3d orbitals.

Aufbau's principle states that electrons will always reside in the orbital of lowest possible energy first, starting from 1s, followed by 2s, etc.

To fill the K and L shells, you need a total of 10 electrons, which calcium has enough.

After that, calcium only has enough electrons to fill the 3s and 3p orbitals of the M shell, and this uses up 8 more electrons.

Calcium, with 2 more electrons, only can place these electrons in the 4s orbital, which has a lower energy than the 3d orbital for atoms before scandium.

Hence, electronic configuration is

1s22s22p63s23p64s2.

In spdf notation, it is 2.8.8.2
hope it helps....