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OpenStudy (anonymous):
if an atom of a element has a mass number of 31 and 16 neutrons in its nucleus, what is the atomic number of the element?
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OpenStudy (anonymous):
Mass no. = No. of Protons + No. of neutrons find no. of protons which is equal to the atomic no.
OpenStudy (anonymous):
so 31 + 16 is my answer?
OpenStudy (anonymous):
31=Z+16 Z=31-16
OpenStudy (anonymous):
yup ryt...the element is phosphorous!
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