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An atom of phosphorus has an atomic number of 15 and a mass number of 31. How many neutrons does it contain
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An atom of phosphorus has an atomic number of 15 and a mass number of 31. How many neutrons does it contain

User Scheibk
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16 neutrons
This is the isotope phosphorus-31. It has 15 protons, 15 electrons, and 16 neutrons.
User Mttmllns
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9 votes

Answer: 16 neutrons

Step-by-step explanation:

Mass-atomic number

31-15=16

User Adam Starrh
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