arodriguez4021 arodriguez4021
  • 17-09-2017
  • Chemistry
contestada

An atom contains 3 protons, 4 neutrons, and 3 electrons. what is its mass number

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haneylia
haneylia haneylia
  • 17-09-2017
Because the atom contains 3 protons, it is Lithium. The isotope is specifically Lithium-7 but Lithium's average mass number is 6.941 amu.
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