Phosphorus has an atomic number of 15 and an atomic weight of 30.974. How many neutrons, approximately, does phosphorus have?

[匿名]

2017-10-08 12:04 am

A.5
B.16
C.30
D.31
E.47

回答 (1)

Trevor H

2017-10-08 1:15 am

No of neutrons = atomic mass number - number of protons.
For the isotope in question , atomic mass number = 31
Number of neutrons = 31 - 15 = 16 neutrons.

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