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24-11-2016
Mathematics

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A neutral atom of sodium (Na) has an atomic number of 11 and a mass number of 23. How many neutrons would be found in the nucleus of this atom of sodium?
34
23
12
11

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nobillionaireNobley nobillionaireNobley

25-11-2016

Mass number = atomic number + number of neutrons
23 = 11 + n
n = 23 - 11 = 12

Therefore, thre are 12 neutron in the neucleus of a Sodium atom.

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