1.

A Copper atoms has 29 electrons revolving around the nucleus. A copper ball contains 4 xx 10^(23) atoms. What fraction of the electrons be removed to give the ball a charge of +9 6muC ?

Answer»

`-1.8 XX 10^(-13)`
`-1.3 xx 10^(12)`
`6 xx 10^(10)`
`-5.2 xx 10^(-12)`

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