What are free electrons?
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The electrons in the orbits which are far from the nucleus are free to move and can easily leave their atoms. These electrons are called free electrons.
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What is the net charge on an atom?
Briefly describe the structure of an atom.
In each of the following cases, state which body loses electrons:
(a) A glass rod when rubbed with silk.
(b) An ebonite rod when rubbed with fur.
What causes the charging of two objects when they are rubbed together?