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The mass of a proton is about how many times that of an electron?

A2000
B3000
C5000
D9000
Answer & Solution
Correct answer: A. 2000
1. The proton came out of the study of canal rays. 2. It is far heavier than the electron. 3. Its mass is about 2000 times greater. _Source: syllabus Science, Ch 4 'Structure of the Atom'_
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