gabrielllajoy gabrielllajoy

20-09-2017
Chemistry

contestada

There are two naturally occurring isotopes of indium: indium-113 and indium-115. How many neutrons are in a single atom of indium-115?
49
66
115
164

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E3nigma E3nigma

26-09-2017

There are 66 neutrons in a single atom of indium-115. The atomic number of indium-115 is 49, meaning there are 49 protons. Then the atomic mass is 115, so 115-49 = 66.

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