Question

The mass of an atom is 234. The nucleus of the atom contains 60+ more neutrons than protons. The atomic number of the atom is

Answer 1

Given: mass number (A)=234
let number of protons be x
A=x+number of neutrons
Given that nucleus contains 60 more neutrons than protons, so
234=x+x+60
234=2x+60
2x=234-60
x=174/2
x=87
thus number of protons are 87 and number of neutrons are 147
hence atomic number of neutrons is 87