Electronic Configuration of First 30 Elements

The standard notation for the indication of the electronic configuration of atoms is written in a sequence of the label names of each atomic subshell with the number of electrons assigned to that specific subshell written in superscript.

These subshells are made up of atomic orbitals. The four subshell labels that are used are s, p, d, and f. The maximum number of electrons allowed in each of these subshells are 2, 6, 10, and 14 respectively.

For example, the names of the subshells in a sulfur atom would be 1s, 2s, 2p, 3s, and 3p (since sulfur has three electron shells). All of these shells are filled except the 3p shell which has four electrons. Therefore, the electronic configuration of sulfur can be written as 1s² 2s² 2p⁶ 3s² 3p⁴.

The electronic configuration of elements can also be written with the help of noble gases. These noble gases have completely filled outermost shells and can be prefixed to the outermost shell of the element whose electronic configuration must be noted.

For example, the electronic configuration of sulfur can be written as [Ne] 3s² 3p⁴, since Neon has an electronic configuration of 1s² 2s² 2p⁶.

Electronic Configuration of First 30 Elements with Atomic Numbers

Given below is a table describing the electronic configuration of first 30 elements with atomic numbers.

Also, check ⇒ Chemistry Concept Questions and Answers

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Electronic Configuration

The electronic configuration of first 30 elements with atomic numbers listed above corresponds to the ground state of the specific elements. Any configuration that does not correspond to the lowest energy state is called an excited state. To learn more about writing the electronic configuration of an atom or a molecule, visit BYJU’S.