JackelynBertman527 JackelynBertman527

02-06-2015
Chemistry

contestada

Isotopes of an element must have different
(1) atomic numbers
(2) mass numbers
(3) numbers of protons
(4) numbers of electrons

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IwAsSoMeGuY IwAsSoMeGuY

02-06-2015

They have different mass numbers, because they have different numbers of neutrons, and neutrons have a mass of 1, meaning changing the number of them will result in a change in the mass of the element

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