If 1.92 g Ar are added to 2.98 atm He in a 2.00 L cylinder at 27.0 C, what is the total pressure of the resulting gaseous mixture?

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.

How can the periodic table be used to predict the behavior of elements?

How is the way a mixture is combined different from how a compound is combined?