Question

neutrons have a mass of 0 amu 1 amu 2 amu 1/2000 amu

Explanation:

Neutrons are subatomic particles found in the nucleus of an atom. They have no electric charge (neutral) but do have mass. In atomic mass units (amu), a neutron has a mass approximately equal to 1 amu. Protons also have a mass of about 1 amu, while electrons have a much smaller mass (about 1/2000 amu). The option "0 amu" is incorrect as neutrons are not massless. The option "2 amu" is also incorrect as that is not the measured mass. The option "1/2000 amu" corresponds to the mass of an electron, not a neutron.

Answer:

1 amu