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Answer to Question #63641 in General Chemistry for Emmanuel D. Kollie

Question #63641
An atom has an atomic number of 9 and a mass number of 19. determine the number of neutrons
1
Expert's answer
2016-11-25T11:38:12-0500
An atomic number shows number of protons and it is also equal to number of electrons. Mass number is sum of numbers of protons and neutrons.
So in our case atom contains 9 protons and (19-9) = 10 neutrons.

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