Question

The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element?

A. \(_{15}^{31}X\)

B. \(_{16}^{31}X\)

C. \(_{15}^{16}X\)

D. \(_{16}^{15}X\)

Answer 1

The number of electrons are equal to the number of protons so the atomic number of the element X will be 15. For the representation purpose is \(_{15}^{31}X\) correct for the element.