Two different isotopes have the same number of protons in their nuclei.
Which statement describes these isotopes?
They are different elements with a different number of neutrons in their nuclei.
2 )
They are different elements with the same number of neutrons in their nuclei.
3 )
They are the same element with a different number of neutrons in their nuclei.
4 )
They are the same element with the same number of neutrons in their nuclei.
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