CadenClough13 CadenClough13

05-10-2018
Physics

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The atomic number of yttrium is 39. The atomic mass of one of its isotopes is 89. How many neutrons are in an atom of this isotope?

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twokneee twokneee

05-10-2018

50. The atomic mass is essentially a tally of all of the atoms in the nucleus, since electrons are essentially negligible in mass.

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