reagan2064
reagan2064 reagan2064
  • 07-10-2018
  • Chemistry
contestada

I need help with Number 61 please

I need help with Number 61 please class=

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yotamkingdom
yotamkingdom yotamkingdom
  • 03-09-2019

Answer:

40 (superscript) is the mass number aka atomic mass, and 19 (subscript) is the atomic number aka number of protons and electrons.

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