तयाअपने मित्र को पत्र लिखिए जिसमें पान लाईन स्टडी केलाभ एवंहानि कावसोवानि हों।
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no of neutrons = 12. Now for an atom to be electrically neutral the no of electrons will be equal to the no of protons. Therefore it's valence = 1.
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