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Carbon Bonding

All compounds can be classified in two broad categories:

  1. organic compounds and
  2. inorganic compounds.

Organic compounds are made primarily of carbon atoms. Most matter in living organisms that is not water is made of organic compounds.

Inorganic compounds, with a few exceptions, do not contain carbon atoms.

A carbon atom has four electrons in its outermost energy level.A carbon atom therefore readily forms four covalent bonds with the atoms of other elements.

A bond formed when two atoms share one pair of electrons is called a single bond.

Functional Groups

In most organic compounds, clusters of atoms, called functional groups, influence the characteristics of the molecules they compose and the chemical reactions the molecules undergo.

Large Carbon Molecules

Many carbon compounds are built up from smaller, simpler molecules known as monomers. Monomers can bond to one another to form polymers

Large polymers are called macromolecules. There are many types of macromolecules, such as carbohydrates, lipids, proteins and nucleic acids.

Monomers link to form polymers through a chemical reaction called a condensation reaction. Each time a monomer is added to a polymer, a water molecule is released.

The breakdown of some complex molecules, such as polymers, occurs through a process known as hydrolysis. In a hydrolysis reaction, water is used to break down a polymer.

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