Draw the Orbital Overlap Diagram of C2H2 (ethyne, acetylene) 

The carbon atoms of C2H2 are sp hybridized. This makes it a challenge to draw, but I will show you the strategies in the video.
In particular, you need to show hybridized sp orbitals along the horizontal bond axis... and then you need unhybridized p orbital going up-and-down from each of the carbon atoms ... and then ANOTHER unhybridized p orbital drawn at an angle, to mimic the fact that it's in a third dimension, coming out of the page at you.
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