Question

Find the number of electrons, protons and neutrons present in ${}_{12}{}^{24}\mathrm{Mg}$.

Answer 1

Atomic number: Atomic number of any neutral element represents the number of protons or electrons present in the atom.

• Here, the Atomic number of ${}_{12}{}^{24}\mathrm{Mg}$ is 12 and its atomic mass number is 24.

Electron: It is a subatomic particle of an atom that has a unit negative charge on it. It is present in the orbits of an atom.

• The atomic number of Magnesium(Mg) is 12, So there are 12 electrons present in it and its electronic configuration is $2\left(\mathrm{K}\right),8\left(\mathrm{L}\right),2\left(\mathrm{M}\right).$

Proton: It is a subatomic particle of an atom that has a unit positive charge on it. It is present in the nucleus of an atom.

• The atomic number of Magnesium is 12, So there are 12 protons present in its nucleus.

Neutron: It is a subatomic particle of an atom that has no charge on it. It is present in the nucleus of an atom.

• The atomic number of Magnesium is 12, and its Mass number is 24. So there are $24-12=12$ neutrons present in its nucleus.