1 atomic unit
Neutrons have the same mass as that of a proton. Neutrons and protons are present in the nucleus
No; the mass of proton is similar to the mass of neutrons.
Thr proton has a similar mass.
Proton
Protons and neutrons have almost the same mass.
No. The mass of neutrons and protons are about the same. The mass of an electron is about 1/1800th the mass of a proton.
No two subatomic particles have the exact same mass. The proton and the neutron, however, come close. Neutrons are heavier than protons by only 2.3 X 10-30 kg. (Neutron: 1.674927351 x 10-27, Proton: 1.672621777 x 10-27)
The mass number is (by definition) the total sum of proton and neutron number in the nucleus of one particular isotope of an element.
A neutron and a proton have approximately the same mass.
Neutrons
Slightly more than that of a proton plus an electron.
just a bit heavier than a proton.