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A tin atom has an atomic number of 50 and a mass number of 118. How many neutrons are present in this atom?
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A tin atom has an atomic number of 50 and a mass number of 118. How many neutrons are present in this atom?

User Quyen Anh Nguyen
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Answer:

68 neutrons

Tin-118 has 68 neutrons and 50 protons, for a neutron-to-proton ratio of 1.36. As in part b, this value and the atomic number both suggest stability.

User Thomas Pornin
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