Which species contains the lowest number of electrons

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

Light waves are as they pass through the

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound