Chapter 30, Problem 1CQ

To determine

To Explain: If larger atomic mass means great atomic number.

Answer to Problem 1CQ

The larger atomic mass does not mean greater atomic number.

Explanation of Solution

Consider the expression for atomic mass.

$A=Z+N$

Here,

$Z$ is the number of protons and

$N$ is the number of neutrons.

Observe that atomic mass is the sum of the number protons and neutrons. If atom A has greater atomic mass than atom B, it depends on both no. of protons and neutrons. Consider the isotopes. They all have the same atomic number but different atomic masses.

Conclusion:

Hence, larger atomic mass does not mean greater atomic number.