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

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Chemistry WAEC 2005

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

  • 15
  • 30
  • 35 checkmark
  • 50

The correct answer is: C

Explanation

Mass number = Protons = Neutrons = 15 + 20 = 35
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