Calcium Electron Configuration: 7 Easy Steps to Follow!

An atom’s electronic configuration represents the distribution of electrons among the s,p,d, and f orbital. Let us discuss some facts about calcium electron configuration.

The Calcium electronic configuration is 1s2 2s2 2p6 3s2 3p6 4s2. The calcium atom contains 20 electrons, and the electronic configuration of calcium is 2,8,8,2. Ca also occurs in group 2 elements and one of the Alkaline earth metals in the periodic table.

This article will discuss some facts about calcium, such as electronic configuration, notation, unabbreviated electron configuration, orbital diagram of the ground state, and excited state calcium.

How to write calcium electron configuration.

The electronic configuration of Ca is 1s2 2s2 2p6 3s2 3p6 4s2 which is written using the following steps-

  • S orbit can hold maximum 2 electrons
  • P orbit can hold maximum 6 electrons
  • D orbit can hold maximum 10 electrons and
  • F orbit can hold maximum 14 electrons

Calcium electron configuration diagram.

The electronic configuration of the calcium is 1s2 2s2 2p6 3s2 3p6 4s2 where electrons are filled to the maximum capacity of the respective orbitals.

  • 2 electrons in 1s orbit.
  • 2 electrons in 2s orbit
  • 6 electrons in 2p orbit.
  • 2 electrons in 3s orbit.
  • 6 electrons in 3p orbit
  • 2 electrons in 4s orbit.

So, the diagram will be-

aufbau lambd
Electron configuration diagram via Aufbau principle.

Calcium electron configuration notation.

Calcium electron configuration notation is [Ar] 4s²

Calcium unabbreviated electron configuration

The unabbreviated electron configuration of Ca is 1s2 2s2 2p6 3s2 3p6 4s2.

Ground state calcium electron configuration.

The ground state calcium electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2.

Excited state of calcium electron configuration.

The electron configuration of calcium (Ca) in excited state is 1s2 2s2 2p6 3s2 3p6 4s1 4px1

Ground state calcium orbital diagram.

The ground state electronic configuration of calcium is 1s2 2s2 2p6 3s2 3p6 4s2, where 20 electrons are present in 4 shells-

  • 2 electrons in K shell
  • 8 electrons in L shell
  • 8 electrons in M shell
  • 2 electrons in N shell
LAMBD CA 1
Ground state calcium orbital diagram

Calcium 2+ electron configuration.

The electronic configuration of a Ca2+ ion is 1s2 2s2 2p6 3s2 3p6, where it removes two electrons from the 4s orbit.

Calcium oxide electron configuration

  •   Ca 2+ electron configuration is 1s2 2s2 2p6 3s2 3p6
  • O 2- (contains 8 electrons) electron configuration is 1s2 2s2 2p6

Conclusion

The calcium (Ca) atom has 20 electrons in its orbit, and the electronic configuration of argon is present in the calcium atom. To donate electrons in the outer most shell of calcium, Oxygen accepts the 2 electrons and forms calcium oxide. Cao is an ionic compound.

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