Explanation:
It is known that atomic mass is the sum of total number of protons and neutrons present in an element.
And, atomic number is the sum of total number of protons present in an atom.
As it is mentioned that the given element has atomic mass 232 and its atomic number is 93. So, number of neutrons present in it are calculated as follows.
Atomic mass = no. of protons + no. of neutrons
232 = 93 + no. of neutrons
no. of neutrons = 232 - 93
= 139
Thus, we can conclude that given element has 139 neutrons.
