Question

What is the mass number of a carbon atom that contains six protons.

Answer 1

a carbon-12 atom has 6 protons, 6 neutrons, and 6 electrons, so its mass number is 12 and its atomic number is 6 . a carbon-14 atom has 6 protons, 8 neutrons, and 6 electrons, so its mass number is 14 and its atomic number is 6