Question

The atomic mass of the stable isotope of an element can be calculated by adding together the number of _____ in an atom of that element.

A. Protons
B. Electrons
C. Neutrons
D. Nucleons

Answer 1

Answer: D

Explanation: nucleons describes both neutrons and protons

Protons of an element are constant

Neutrons can change depending on the isotope

Eg hydrogen has one proton

But deuterium ( isotope of hydrogen ) has one proton and 1 neutron

Answer 2

The atomic mass of an element is calculated by adding the number of protons and neutrons in an atom of that element.

Step-by-step explanation:

The atomic mass of the stable isotope of an element can be calculated by adding together the number of protons and neutrons in an atom of that element. The atomic mass, also known as the mass number (A), represents the total number of protons and neutrons in the nucleus of an atom. For example, a carbon atom with 6 protons and 6 neutrons has an atomic mass of 12.