syd1112
syd1112 syd1112
  • 12-10-2017
  • Physics
contestada

what is the mass number of an atom with 5 protons and 7 neutrons?

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GingerSnaps
GingerSnaps GingerSnaps
  • 12-10-2017
Boron I think look at the periodic table
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AL2006
AL2006 AL2006
  • 12-10-2017
Pretty close to 12 .
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