Katejoh342 Katejoh342
  • 08-02-2021
  • Mathematics
contestada

An atom of a certain element has 21 protons, 21
electrons, and a mass number of 45. How many
neutrons are in this atom?

Respuesta :

olioctipi
olioctipi olioctipi
  • 08-02-2021
45-21=24 neutrons :)

As the generally accepted mass of an electron is 0. So, to find the mass of neutrons, minus the protons from the total mass.
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