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What is the mass number of an element having 20 neutrons, 15 protons and 15...

Chemistry
WAEC 2005
What is the mass number of an element having 20 neutrons, 15 protons and 15 electrons?
  • A. 15
  • B. 30
  • C. 35
  • D. 50
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Correct Answer: Option C
Explanation
Mass number = Protons = Neutrons = 15 + 20 = 35
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