jonestheproblem2872 jonestheproblem2872
  • 09-10-2017
  • Chemistry
contestada

Calcium has an atomic mass of 40 and an atomic number of 20, so the number of neutrons must be _______________

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znk
znk znk
  • 30-09-2018

The atom would have 20 neutrons.

Mass number = neutrons + protons

40 = neutrons + 20

neutrons = 40 – 20 = 20

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Weser17 Weser17
  • 23-01-2019
20 is the right answer for apex
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