milyfrancisco8 milyfrancisco8
  • 25-02-2021
  • Chemistry
contestada

umm care to help, please

umm care to help please class=

Respuesta :

88119545
88119545 88119545
  • 25-02-2021

Answer:

17.5

Explanation:

Answer Link
finstagroup13
finstagroup13 finstagroup13
  • 25-02-2021

20

Explanation:

Protons (the atomic number) and neutrons both contribute to the atomic mass.

If you therefore subtract the number of protons (19) from the atomic mass (39), you are left with the number of neutrons (=20).

hope this helped :)

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