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What two atomic orbitals or hybrid atomic orbitals overlap to form the carbon-carbon σ bond in ethyne? sp—sp s—s sp3—sp3 p—p sp2—sp2?

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kenmyna
  The  two  atomic orbital or  hybrid  atomic  orbitals that overlap to form the carbon-carbon α  bond  in ethyne  is

SP- SP  atomic orbital

 Ethyne is  made up of two carbon atoms  where each  carbon atom is an SP  hybridized . In  ethyne  the   one sp orbital  of each   carbon atom  overlap to  each other  to form a  sigma bond (α). The remaining  Sp  orbital  overlap  with 1s from hydrogen to produce  two sigma bonds