Q :If number of electrons in an atom is 8 and number of protons is also 8, then (i) what is the atomic number of the atom and (ii) what is the charge on the atom?


ANS:(i) The atomic number is equal to the number of protons. Therefore, the atomic number of the atom is 8.

(ii) Since the number of both electrons and protons is equal, therefore, the charge on the atom is 0.

 

My Q: Why is the charge on the atom 0????

Actually atom contains equal no of e and p which have opposite charges. So an atom has charges but net charge is zero i.e. atom is neutral or sometimes we say as it has zero charge. 

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