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16 January, 13:24

11. What is the mass number

of an element if its atom

contains 10 protons, 10

electron, and 12 neutrons?

A 12

C20

D. 32

+2
Answers (1)
  1. 16 January, 13:56
    0
    Answer:The mass numbr is 22

    Explanation:

    Mass number=number of protons + number of neutrons ... which is 10+12=22
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