Question

The only elements having no neutron is

Answer 1

Answer:

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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.

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Answer 2

Protium,

which contains a single proton and a single electron, is the simplest atom.

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