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  • 19-01-2018
  • Chemistry
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What is the mass number of an atom of 5 protons and 7 nuetrons

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t0x1cZ
t0x1cZ t0x1cZ
  • 19-01-2018
7 + 5 = 12. But there is also electrons, and there is an equal amount. The atomic mass is 17.
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