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Parts and weights of atoms?

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(Modern view of atoms?)

Modern view of atoms?

Is there an atom that does not have neutrons?

There is only one stable atom that does not have neutrons. It is an isotope of the element hydrogen called protium. Protium, which contains a single proton and a single electron, is the simplest atom. All other stable atoms contain some number of neutrons.

Author:

Steve Gagnon, Science Education Specialist (Other answers by Steve Gagnon)