It s very important to identify your area of interest and level of commitment to the nursing field and then formulate a plan that will help you meet the nursing requirements to get you to the career level you desire.
Oxygen would be (O2). The 2 is a subscript. Sub means below. The 2 is written to the right of and below the O. A pair of oxygen atoms is a molecule of oxygen. A molecule is the smallest particle of a substance that exists independently. Molecules of most elements are made up of only one of atom of that element. Oxygen, along with nitrogen, hydrogen, and chlorine are made up of two atoms. Look at the model of oxygen above.
Definition. 1  The molecule must be cyclic. 2  The molecule must be planar. 3  The molecule must have a complete conjugated Ï-electron system within the ring. 4  The molecule must have 4n Ï-electrons where n is any integer within the conjugated Ï-system.