Question

What is the electronic configuration of Strontium?

Answer 1

Hint: The distribution of electrons in an element's atomic orbitals is described by its electron configuration. Atomic electron configurations follow a standard nomenclature in which all electron-containing atomic subshells are arranged in a sequence (with the number of electrons they possess indicated in superscript).

Complete answer:
Electron Configurations in writing shells: The main quantum number determines the maximum number of electrons that may be accommodated in a shell (n). The shell number is expressed by the formula $2n^2$, where n is the number of shells.
Subshells: The azimuthal quantum number (abbreviated as ‘l') determines the subshells into which electrons are dispersed.
The value of the primary quantum number, n, determines the value of this quantum number. As a result, when n = 4, four distinct subshells are conceivable.
Notation
Subshell labels are used to represent an atom's electron arrangement.
The shell number (determined by the main quantum number), the subshell name (determined by the azimuthal quantum number), and the total number of electrons in the subshell are all listed in superscript on these labels.
According to the Aufbau principle, electrons will first occupy lower-energy orbitals before moving on to higher-energy orbitals.
Because strontium has atomic number 38, its electron configuration is 2.8.18.8.2.
This is written in orbital notation as: $$1s^{2}2s^2{p}^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^{6}5s^2$$

Note:
The chemical element strontium has the symbol Sr and the atomic number 38. Strontium is a delicate silver-white yellowish metallic element with a strong chemical reactivity. It is an alkaline earth metal. When exposed to air, the metal produces a black oxide coating. Strontium has physical and chemical characteristics with its two vertical periodic table neighbours, calcium and barium. It is usually obtained from the minerals celestine and strontianite, which exist naturally.