CARBON ATOM HAS 2 VALENCE ELECTRON THEN WHY IT IS CALLED AS TETRAVALENT?
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Solution
Carbon has electronic configuration 2,4 or 1s2 2s2 2p2
L is the valence shell which has 2 electrons each is 2s and 2p shell and a total of 4.
It forms 4 bonds when combining with other elements and so is tetravalent.