vitefraise0s2i

2023-02-20

What is the mass number of an atom which contains 28 protons, 28 electrons, and 34 neutrons?

A) 28

B) 56

C) 62

D) 90

A) 28

B) 56

C) 62

D) 90

migoljifm0y

Beginner2023-02-21Added 5 answers

The correct answer is C) 62

Atomic mass is found by adding the number of protons to the number of neutrons, 28 + 34 = 62. Because electrons have negligible mass, their number is not included in the atomic mass formula.

Atomic mass is found by adding the number of protons to the number of neutrons, 28 + 34 = 62. Because electrons have negligible mass, their number is not included in the atomic mass formula.