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What is the mass number of an element if its atom contains 10 protons, 10...

Chemistry
WAEC 2000

What is the mass number of an element if its atom contains 10 protons, 10 electrons and 12 neutrons?

  • A. 32
  • B. 22
  • C. 20
  • D. 10
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Correct Answer: Option B
Explanation

Mass number = Proton + Neutron

                      = 10 + 12 = 22  -  Option A

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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