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Answered

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 What is the approximate mass of a proton?
(1) 1 u
(2) 0.0005 u 
(3) 1 g
(4) 0.0005 g

Sagot :

Mass of a proton is considered to be one mass unit. Thus, the mass of proton is taken as 1u.

Thus, the answer is (1) 1u