Question

The isotopes of an element X are ${}_z{X}^A,{}_z{X}^{A+1},{}_z{X}^{A+2}$ respectively. What is the ratio of the number of nucleons in these respective isotopes?

• A. A : (A + 1) : (A + 2)
• B. 1 : 1 : 1
• C. (A - Z) : ((A + 1) - Z) : ((A + 2) - Z)
• D. 1 : 2 : 3

Answer 1

The correct option is A A : (A + 1) : (A + 2)

Nucleons are one of the particles that make up the atomic nucleus. Therefore their ratio is
${}_Z{X}^A,{}_Z{X}^{A+1},{}_Z{X}^{A+2}isA:(A+1):(A+2)$