Trigonal Planar

Science / Chemistry / Trigonal Planar: A molecular shape that results when there are three bonds and no lone pairs around the central atom in the molecule. The pairs are arranged along the central atom's equator, with 120° angles between them. The carbonate ion (CO32-) has a trigonal planar geometry.

Trigonal Pyramidal

Science / Chemistry / Trigonal Pyramidal: A molecular shape that results when there are three bonds and one lone pair on the central atom in the molecule. NH3 is a trigonal pyramidal molecule. MORE

Trigonal Planar

Science / Chemistry / Trigonal Planar: A molecular shape that results when there are three bonds and no lone pairs around the central atom in the molecule. The pairs are arranged along the central atom's equator, with 120° angles between MORE

Trigonal Bipyramidal

Science / Chemistry / Trigonal Bipyramidal: A molecular shape that results when there are five bonds and no lone pairs on the central atom in the molecule. Three of the bonds are arranged along the atom's equator, with 120° angles between them MORE

Planaria

Science / Biology / Planaria: Small free-living fiatworms (Phylum Platyhelminthes) with bilateral symmetry and cephalization. The freshwater type is often used as an experimental organism. MORE

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