The conversation between human and AI assistant.
Why was carbon-12 selected as the standard element for atomic mass?
That makes sense. Can you tell me more about isotopes?
Isotopes are atoms of the same element that have a different number of neutrons in their atomic nucleus. This means that they have the same number of protons and electrons, but different atomic masses. Isotopes can be either stable, like carbon-12, or unstable, which are radioactive and undergo decay over time.