find groups periods and the of elements using given electronic configuration 1s22s22p5 1s22s22p63s23p1 1s22s22p3 1s22s22p63s23p64s2 1s22s22p63s23p4 1s22s22p63s1

What is this supposed to be?

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   

Ibelieve its because the stove is a cleaner burning fuel