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Calculate the mass number of an atom with 8 protons, 12 neutrons and 10 electrons

User Jjchiw
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2 Answers

5 votes

Answer: 20

Explanation: Mass number is the number of neutrons plus the number of protons. 8 + 12 gives 20.

User Young Fu
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2 votes

Mass number

  • No of protons+No of neutrons
  • 12+8
  • 20

Mass number is 20

User Immayankmodi
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