you add a s to to if your talking about planar or plura nouns
CO32- is trigonal planar, bond angles are 1200
The population of Planar Systems is 456.
The population of Planar Systems is 2,010.
Planar Systems was created in 1983.
square planar
Formaldehyde has a nonpolar trigonal planar molecule.
Planar is the word used to describe the sole of the foot.
square planar
Bromine gas is linear because there is only two atoms involved in the molecule.
flat & non-flat
Planar offers a 3-year warranty on the product.
Lenses may be planar, convex, or concave.