PDF chapter test TRY NOW
Calculate the number of neutrons present in the nucleus of an element X which is represented \(_{15}\textrm{X}^{31}\).
Given element is \(_{15}\textrm{X}^{31}\).
Atomic number \(=\)
Mass number \(=\)
We know,
Atomic number \(=\) Number of \(=\) Number of electrons
Number of neutrons \(=\) .