What group of elements is most likely to contain elements that will be found pure in nature? strong metals transition metals nonmetals noble gases

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Connect the whole numbers on the periodic table to indicate what they represent?

Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.