One atom of gold weighs 3.27 x 10-13 ng. how many gold atoms are in 1.0 g of gold?

This would be canberra.

They can measure  the amount of energy gained or lost

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