why the valency of oxygen is 2?
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Oxygen is a chemical element with symbol O and atomic number 8. Electronic configuration of oxygen is [He]2s2,2p4 i. e. 2,8,6. To complete the octet it require 2 more electrons, hence the combining capacity or valancy of oxygen is 2.
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oxygen is a chemical element with symbol zero and atomic number8 electronic configuration of of oxygen is 282 284
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