CBSE Class 12-science Answered
A
material of mass 5 g contains 3 × 1022
atoms. The nucleus of each atom possesses a charge of 25e. To give it a
charge of 4.8 μC,
what percentage of electrons must be removed from it?
Asked by Topperlearning User | 05 May, 2016, 05:40: PM
Expert Answer
The nucleus of each atom of the material contains a charge of 25e. Therefore, each atom contains 25 electrons.
Therefore, the total number of electrons in the material is N = 25 × 3 × 1022
Now, we know that an atom as a whole is neutral. So, to give the material a net positive charge, the number of electrons to be removed is
Hence, the percentage of electrons removed is
Answered by | 05 May, 2016, 07:40: PM
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