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Discussion Board for a Question on Quiz: Chemistry (WAEC 2000)
Chemistry (WAEC 2000)
50 Questions ·
Public
·
Objective
·
Quiz suitable for all ages
42
Click Here To Discuss Question
What is the mass number of an element if its atom contains 10 protons, 10 electrons and 12 neutrons?
Select 1 Option (1 Mks)
32
22
20
10
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