What is the atomic mass of an atom five protons and seven neutrons

Answer 1

To determine the atomic mass of an atom, you need to add up the masses of all its protons and neutrons.

The mass of a proton is approximately 1.0073 atomic mass units (amu), while the mass of a neutron is approximately 1.0087 amu.

Therefore, for an atom with five protons and seven neutrons, you would calculate the atomic mass as follows:

(5 protons x 1.0073 amu/proton) + (7 neutrons x 1.0087 amu/neutron) = 5.0365 amu + 7.0619 amu = 12.0984 amu

The atomic mass of an atom with five protons and seven neutrons is approximately 12.0984 atomic mass units (amu).