The answer will be a or d im not really sure but the two of them will work
145 since it’s the mass number plus protons I think
Answer:
A neutron is a subatomic particle with a mass comparable to a proton and a neutral electrical charge. A neutron is a subatomic particle with a mass of 1 and charge of 0. ... While the number of protons in a atom determines its element, the number of neutrons determines its isotope
Explanation:
thank me later:()