kayyyy21 kayyyy21
  • 11-10-2016
  • Chemistry
contestada

In an atom of argon-40 the number of protons

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SJ2006
SJ2006 SJ2006
  • 19-10-2016

Number of protons is equal to atomic number and as argon atomic number is equal to 18 it would have 18 protons.

So, your answer is 18

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