Atoms of the same element that have different numbers of neutrons are ___________ of that element.

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Isotopes are atoms of the same element that have different numbers of neutrons. Ions are atoms or molecules with a net electrical charge due to the loss or gain of electrons, which does not directly relate to the number of neutrons. Electrons are negatively charged particles found in all atoms. Atomic numbers represent the number of protons in an element's nucleus and are an identifying characteristic of the element, but they do not describe isotopes.

Atoms of the Same Element That Have Different Numbers of Neutrons