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. \(\frac{31}{35}\)X

B. \(\frac{31}{16}\)X

C. \(\frac{16}{15}\)X

D. \(\frac{15}{16}\)X

Answer 1

Any element is represented symbolically as:

Here mass number = 15 + 16 = 31

Atomic number = number of protons = 15

Hence, the correct representation of the element with 15 electrons and 16 neutrons is
\(\frac{31}{15}\)X.

Hence, the correct option is – A