Assume that each of copper atom has one free electron, estimate the number of free electrons in 1 mg of copper.Given that atomic weight of copper = 63.5. What is the charge possessed by these free electrons?

Explanation

No of atoms in 1 mg of copper is
`(6.023xx10^(23))/63.5xx10^(-3)=9.48xx10^(18)`
Since, it is assumed that one copper atom has one free electron, so no of free electrons = `9.48xx10^(18) therefore=(1.6xx10^(-19))xx(9.48xx10^(18)=1.51C`.