proton no = 8 , electron no = ?
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If number of electrons in an atom is 8 and number of protons are also 8, then (i) what is the atomic number of the atom? ... 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.
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Answer: Different elements have different atomic numbers; therefore, atoms of different elements contain different numbers of protons (and electrons). Oxygen has the atomic number 8; its atoms contain 8 protons and 8 electrons.
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