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trigonal planar
tetrahedral due to the four area of electron density (two loan pair electrons and two bonded pairs).
Anything with six electron groups, keep in mind an electron group is a bonded atom or an electron pair, is an octahedral. Anything in an octahedral and a lone pair is the square pyramidal geometry. So all angles between the atoms are a little less than 90 degrees and the angle of the electron pair is greater than 90.
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The molecular geometry of propane (C3H8) is tetrahedral around each carbon atom. Each carbon is bonded to four other atoms—either hydrogen or another carbon—resulting in a bond angle of approximately 109.5 degrees. The overall shape of the propane molecule is a straight-chain or branched structure, depending on the arrangement of the carbon atoms.