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11 November, 18:53

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

+1
Answers (1)
  1. 11 November, 19:09
    0
    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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