Question

What is the mass of an atom if it has 11 protons, 12 neutrons, and 11 electrons

A,22, B.23, C34, D 11

Answer 1

B) 23

Step-by-step explanation:

Relative Mass = number of protons + number of neutrons

Relative Mass = 11 + 12

Relative Mass = 23

Answer 2

23, B

Step-by-step explanation:

The mass of an atom is determined by the number of Protons + Neutrons. Here, if we assume the units is AMU (Which means the mass unit for a proton and neutron would be basically 1), the answer would be 11 + 12 = 23 AMU, which is B.