Question

The mass of an atom is determined by the sum of the masses of

• A. Electrons
• B. Neutrons
• C. Neutrons and protons
• D. Electrons and neutrons

Answer 1

The correct option is C

Neutrons and protons

The explanation for the correct option;

Option C

The mass number is defined as the sum of the total number of protons and neutrons present in the nucleus of an atom of an element. it is denoted by the letter A.

Mass number(A) = Number of protons (p) + Number of neutrons (n)

Mass number(A)= Atomic number (Z)+ Number of neutrons

Therefore, Option (c) is the correct answer.