Answer:
B) an atom with 6 protons and 6 neutrons - an atom with 6 protons and 7 neutrons
Step-by-step explanation:
- An atom is the smallest particle of an element that can take part in a chemical reaction.
- Atoms consists of subatomic particles neutrons, electrons and protons.
- Atoms of the same element have an equal number of protons in their nucleus.
- Atoms may, however, differ in the number of neutrons.
- Such atoms that have a different number of neutrons but an equal number of protons are known as isotopes of an element.