Which atoms in the table are the same element and with what reasoning?

Atoms 2 and 3, because they have the same number of electrons.
All atoms are the same because they have the same number of neutrons.
Atoms 1 and 3, because the sum of all subatomic particles are equal.
Atoms 1 and 2, because they have the same number of protons.

Which atoms in the table are the same element and with what reasoning Atoms 2 and 3 because they have the same number of electrons All atoms are the same becaus class=

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