What number of molecules (or formula units) are present in 1.00 g of each of the compounds? a) H3N b) H4N2 c) (NH4)2Cr2O7

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

All motion is caused by force? true or false

One similarity and one difference between an element and a mixture of elements