why does carbon usually form four single bonds & not two?

carbon +4 is more stable than +2 [inert pair effect].

hence it usually form foir single bonds.

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Dear Bipasha,

Since the valency of carbon is 4 so it can form 4 bonds only. In that case it is called saturated hydrocarbon. If on the contrary it forms a double or triple bonds then it is called unsaturated hydrocarbon.

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the tetravalency of carbon is 4 and it can bond 4 single bonds. If it forms 2 single bonds, it cannot be stable 

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Dear Mehruna Bipasha,

Carbon atom is tetravalent in nature i.e it wants four more electrons to reach the stable noble gas(Neon) configuration of 1s² 2s² 2p⁶

Carbon atom has 6 electrons in it & has an electronic configuration of 1s² 2s² 2p²

It therefore to become stable must get four more electrons to attain the stable Noble Gas electronic configuration!!!

That is the reason why it forms four single bonds & not just two single bonds !!

Hope you understood now..

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