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The charge on a proton is taken as:

APlus four
BPlus one
CPlus nine
DPlus five
Answer & Solution
Correct answer: B. Plus one
1. Its mass is taken as one unit. 2. The charge is equal and opposite to the electron's. 3. It is plus one. _Source: syllabus Science, Ch 4 'Structure of the Atom'_
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