Question

What is the electron configuration of an element with atomic number $12$ ?

Answer 1

We have to know the electronic design of a component is representative documentation of the way where the electrons of its atoms are circulated over various nuclear orbitals. While composing electron designs, normalized documentation is continued in which the energy level and the kind of orbital are composed first, trailed by the quantity of electrons present in the orbital written in superscript.

Complete step by step answer:
We have to know the three principles that direct the way where electrons are filled in electronic configuration, that has to be given,
- The Aufbau standard, electrons should totally fill the nuclear orbitals of a given energy level prior to involving an orbital related with a higher energy level. Electrons involved orbitals in the expanding request of orbital energy levels.
- Pauli's rejection rule, that expresses that no two electrons can have equivalent qualities for each of the four quantum numbers. Subsequently, each subshell of an orbital can oblige a limit of two electrons and both these electrons must have inverse twists.
- Hund's standard of greatest variety, all the subshells in an orbital should be independently involved before any subshell is doubly involved. Moreover, the twist of the relative multitude of electrons in the separately involved subshells should be something similar to augment the general twist.
The component with the electronic configuration $12$ is magnesium. Therefore, the electron setup of an impartial magnesium particle is, $1{s^2}2{s^2}2{p^6}3{s^2}$.

Note: We have to know that, an electron designs give understanding into the substance conduct of components by deciding the valence electrons of a molecule. It likewise orders components into various squares, (like, $s{\text{,p,d,f}}$ - block components). This makes it simpler to aggregately, contemplate the properties of the components.