Question

The atomic numbers of some elements are given as $10,20,7,$ and$14$. What is the electronic configuration of these elements.

Answer 1

Electronic configuration:

1. The distribution of electrons in atomic or molecular orbitals of an atom or molecule is known as the electron configuration.
2. The electrons are filled according to the Aufbau principle.
3. According to the theory, electrons first exist in lower energy orbitals before moving on to higher energy orbitals.
4. The following ordering for energy orbitals is used: $1\mathrm{s},2\mathrm{s},2\mathrm{p},3\mathrm{s},3\mathrm{p},4\mathrm{s},3\mathrm{d},4\mathrm{p},5\mathrm{s},4\mathrm{d},5\mathrm{p},6\mathrm{s},4\mathrm{f},5\mathrm{d},6\mathrm{p}$ and $7\mathrm{s}$.

Neon:

1. It is a chemical element with an atomic number $10$ and is represented as $"\mathrm{Ne}"$.
2. It is a colorless, odorless inert gas.
3. Its electronic configuration is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6$.

Calcium:

1. It is a chemical element with an atomic number$20$ and is represented as $\mathrm{Ca}$.
2. It is a highly reactive metal.
3. The electronic configuration is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}4{\mathrm{s}}^2$.

Nitrogen:

1. It is a chemical element with an atomic number $7$ and is represented as $"\mathrm{N}"$
2. It is a non-metal and most abundant element in the universe.
3. Its electronic configuration is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^3$.

Silicon:

1. It is a chemical element with an atomic number $14$and is represented as $"\mathrm{Si}"$.
2. It is a solid, crystalline metalloid and semiconductor in nature.
3. Its electronic configuration is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^2$.