The electron configuration of Cobalt is [Ar]4s23d7.

Which of the following is the correct electron configuration for cobalt?

The ground state electron configuration of cobalt is [Ar]3d74s2 . This noble gas notation means that cobalt has the electron configuration of argon plus the 3d74s2 electrons. Argon has an atomic number of 18, and a neutral atom has 18 electrons.

What is electronic configuration of cobalt Class 10?

The s, p, d, f subshells are written along with the number of the shell, like 1,2, 3, etc. Hence, the electronic configuration of cobalt is 1s22s22p63s23p64s23d7that has the energy levels and subshells occupied by the electrons according to the Aufbau principle.

The Order of Filling Orbitals

The aufbau principle explains how electrons fill low energy orbitals (closer to the nucleus) before they fill higher energy ones. This means that the 4s orbital which will fill first, followed by all the 3d orbitals and then the 4p orbitals.

How do you write electronic configuration?

While writing electron configurations, a standardized notation is followed in which the energy level and the type of orbital are written first, followed by the number of electrons present in the orbital written in superscript. For example, the electronic configuration of carbon (atomic number: 6) is 1s22s22p2.

The complete electron configuration of cobalt is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^7. These electrons are core electrons because they are stable and do not take part in bonding. The remaining electrons are called valence because they do take part in bonding.