A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition. The ratio of each element is ...

Catalysis: They are essential in catalysis, particularly in processes like hydrogenation, hydroformylation, and polymerisation. For example, Ziegler-Natta catalysts, which are organometallic compounds ...

There are lots of different substances but only just over a hundred elements. An element is a substance that is made up of only one kind of atom. The atoms in a particular element are the same as each ...

Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change, ...

Chemical Reactions: A chemical reaction is a process where the substances 8unbdergo a change in their chemical composition. The substances that enter the reaction are called reactants that are then ...

People are occasionally exposed to potentially harmful substances in the environment or through their diets or habits. For example, a compound found in cigarette and industrial smoke, benzo(a)pyrene ...