The two types of pure substances are elements and compounds. A pure substance is that which consists of only one component with distinct chemical and physical properties. Any substance with more than one component is cal... More »

Sugar is a pure substance because its composition is homogeneous throughout. Pure substances can be either elements or compounds. Sugar or sucrose is a compound with the chemical formula C12H22O11. More »

Sodium chloride, better known as table salt, is considered a pure substance because it is a homogeneous compound. A pure substance can be either an element or a compound, where the individual chemical elements are always... More »

Elemental mercury is a pure substance and its own element on the periodic table of elements. It can be combined with other elements to form compounds of various natures, such as mercury oxide. Mercury occurs naturally, b... More » Science Chemistry Atoms & Molecules

A molecule is a group of two or more atoms bonded together, while a compound is a group of two or more atoms bonded together where the atoms are from at least two types of elements. All compounds are also molecules, but ... More »

Water contains two types of elements, hydrogen and oxygen, and three atoms in total. Because hydrogen is the most abundant element in the universe and oxygen is also common, water is thought to be a common chemical throu... More »

There are two types of polymerization known as step-reaction polymerization or condensation and chain-reaction polymerization. These two types of polymerization both create high molecular mass molecules from monomers thr... More »