myrickmadison608 myrickmadison608
  • 25-09-2020
  • Chemistry
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if an atom has an atomic number of 7 and a mass of 15, how many electrons does it contain

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hanatarek1812
hanatarek1812 hanatarek1812
  • 25-09-2020
It has 7 electrons

The atomic number for any element is the number of protons in its atomic nuclei. In a neutral atom, the number of electrons are the same as the number of protons. The atomic mass (mass number) is the sum of the protons and neutrons in the nucleus. Mass number can vary due to the fact that the number of neutrons can vary.
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