The atomic mass of an atom in atomic mass units is approximately equal to the number of which subatomic particles in the atom?

A. neutrons and protons

B. protons and electrons

C. electrons and neutrons

D. neutrons, protons, and electrons

Question

Johan Dickson

Chemistry

19 January, 20:03

The atomic mass of an atom in atomic mass units is approximately equal to the number of which subatomic particles in the atom?

A. neutrons and protons

B. protons and electrons

C. electrons and neutrons

D. neutrons, protons, and electrons

+5

Answers (2)

Know the Answer?

Ismael Byrd · Answer 1

A. Neutrons and Protons

Karsyn Soto · Answer 2

Answer: The correct answer is Option A.

Explanation:

Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.

A = Mass number = Number of protons + Number of neutrons

For Example: Taking potassium element

Number of protons = 19

Number of neutrons = 20

Number of electrons = 19

Thus, the mass number of potassium element = 20 + 19 = 39

Hence, the correct answer is Option A.

The atomic mass of an atom in atomic mass units is approximately equal to the number of which subatomic particles in the atom?A. neutrons and protonsB. protons and electronsC. electrons and neutronsD. neutrons, protons, and electrons

The atomic mass of an atom in atomic mass units is approximately equal to the number of which subatomic particles in the atom?

A. neutrons and protons

B. protons and electrons

C. electrons and neutrons

D. neutrons, protons, and electrons