Practice problem
Can two atoms of the same element have different masses?
No, because mass number defines the identity of an element.
No, because only protons have mass, and therefore an atom with a higher mass must have more protons.
Yes, because one of the atoms could be an ion with more electrons, and electrons have a larger mass than protons.
Yes, because atoms of the same element can have different numbers of neutrons.
Type a concept, like “slope” or “photosynthesis”.
