Question

Atomic Nucleus: The mass number of an atom is equal to the number of what particles in the nucleus?

A)

electrons
B)

nucleons
C)

neutrons
D)

protons
E)

positrons

Answer 1

Nucleons

The mass number of an atom is equal to the number of protons and neutrons called the nucleons particles in the nucleus!

Answer 2

Nucleons

Step-by-step explanation:

MASS NUMBER :

• Mass number is denoted by A
• Mass number is the sum of number of proton and number of neutron in the atom.
• Both proton and neutron are present in the nucleolus pf the atom and are called nucleons
• So the mass number of an atom is equal to the number of nucleons
• Number of nucleons = number of proton+number of neutron