Chemistry
Chemistry, 30.07.2019 12:30, crjjk01

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 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 an atomic number of 20 and a mass number of 40. an atomic number of 21 and a mass number of 42. 22 protons and 20 neutrons. 22 neutrons and 20 protons?

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

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