Question

Name the Subatomic Particles present in an atom of Sodium.

Answer 1

According to the definition of Atomic Number(Z) and Mass number(A),

$$\begin{gathered} \mathrm{Atomic}\mathrm{Number}\left(\mathrm{Z}\right)=\mathrm{Number}\mathrm{of}\mathrm{Electrons}\left(\mathrm{e}\right)=\mathrm{Number}\mathrm{of}\mathrm{Protons}\left(\mathrm{p}\right) \\ \mathrm{Mass}\mathrm{Number}\left(\mathrm{A}\right)=\mathrm{Number}\mathrm{of}\mathrm{Protons}\left(\mathrm{p}\right)+\mathrm{Number}\mathrm{of}\mathrm{Neutrons}\left(\mathrm{n}\right) \end{gathered}$$

1. Atomic Number of Sodium is 11
   Hence, Number of Electron = 11 and Number of Proton = 11
2. Mass number of Sodium is 23
   Since, the Number of Protons = 11, Number of Neutrons in Sodium 12. ( 23-11=12)
3. Hence, In Sodium Atom three subatomic particles namely Electron, Proton and Neutron are present.