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 X

a)31X15
b)31X16
c)16X15
d)15X16​

Answer 1

Answer:

Given that, number of electrons in element X = 15 and number of neutrons = 16 <br>

Atomic number = number of protons = number of electrons in neutral atom = 15 <br>

Mass number = number of protons + number of neutrons <br>

= 15 + 16 = 31 <br>

Thus, the atom is represented as `""_(15)^(31)X`