Which are isotopes? an atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has?

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asked Jul 12, 2019 170k views

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Hans Holzbart · Answer 1 · 2019-07-16T09:41:06+0000

Isotopes have same atomic number or same number of protons, but different number of neutrons and mass number.

If they have same atomic number or same number of protons as the original one they are isotopes.

Which are isotopes? an atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has?

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