I need help with billing... 1  Payment - get help with making payments online. 2  Billing - get help with billing questions. 3  Usage - learn how to view usage and unbilled usage.  Plan - get help with price plan.
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.The two balls represents the two oxygen molecules. 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.
Is the molecule the basic unit for all elements? No, the atom is the basic unit for elements. An element consists of one type of atom; iron consists of iron atoms, sulfur consists of sulfur atoms, and so on. A Molecule is a â¦group of atoms of one or more types; carbon dioxide (CO2) is a molecule consisting of one carbon atom and two oxygen atoms, water (H2O) consists of two hydrogen atoms and one oxygen atom.