It represents a diatomic molecule of hydrogen consisting of two atoms of the element that are chemically bonded together. Mass fractions are always between 0 and 1 but are frequently expressed as percent. Look at the examples below and match them with their identical molecule under the Kekule structures and the line formulas.
In this example there are.
For example the element mercury is shown as Hg. Explore the classroom or your home to find ten substances that you have no idea of their chemical content. A compound has a chemical formula. You can think of the formula in two ways.