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  • What will be the mass number of an atom if the number of ...
Multiple choice

What will be the mass number of an atom if the number of electrons, protons and neutrons is 8, 8 and 9, respectively?

  1. 16

  2. 20

  3. 18

  4. 17

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mass number (A) = Number of protons + number of neutrons = 8 + 9 = 17

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