Answer: the answer is d
Explanation:because atoms are what make things up and that means there are multiple molecules in one atom
Answer: 12 Protons, 12 electrons and 16 neutrons. The number of protons and electrons always stays the same, but the neutrons is the mass-protons. In this case, 28-12=16 neutrons.
Isotopes have same atomic number but different atomic mass number.
Hence option B is correct.
Hope this helps you!
I think it might be lead? I'm not quite too sure though. You might have to research more into it.