What does adding a neutron to an atom's nucleus do to the atom's mass?
O
A. It adds 1 more unit of mass to the atomic weight of the atom.
B. A proton will be added with the neutron, increasing the weight by 2
mass units.
C. A neutron has no mass, so the atomic mass will remain
unchanged.
O
D. Adding a neutron is balanced by adding an electron, keeping the
mass the same.