Which is the metric root for length?
a. gram
b. liter
c. meter
d. second

The number of protons in a nucleus

Cis your correct answer

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf