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2 December, 16:17

An atom has 13 protons and 14 neutrons. What is its mass number?

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Answers (2)
  1. 2 December, 18:37
    0
    you add 13 and 14 and get 27 because It is the total amount.
  2. 2 December, 18:45
    0
    Protons have a mass of 1

    Neutrons have a mass of 1

    So 13*1 + 14*1 = Mass number 27
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