Name the three sub-atomic particles of an atom.

The average atomic mass of a sample of an element $X$ is $16.2 \, u$. What are the percentages of isotopes $_8^{16}X$ and $_8^{18}X$ in the sample (in $\%$)?

On the basis of Rutherford's model of an atom,which subatomic particle is present in the nucleus of an atom?

If an atom contains one electron and one proton,will it carry any charge or not?

Isotopes of an element have

Write the electronic configuration of any one pair of isotopes and isobars.