Organic Chemistry Made Easy: GCSE Combined Science

Welcome to our exploration of carbon, the building block of life!Carbon is unique among all elements because of its special electron structure.It has four valence electrons in its outer shell, allowing it to form four strong covalent bonds.This property, called tetravalency, allows carbon to form bonds in a tetrahedral arrangement, as seen in methane, CH4.These covalent bonds are strong and stable, formed by sharing electrons between atoms.Carbon's ability to form bonds allows it to create chains of varying lengths.It can also form rings, which are essential for many biological molecules.These fundamental properties of carbon make it essential for all organic chemistry.Organic compounds are organized into families called homologous series.Let's look at alkanes, which are hydrocarbons with only single bonds between carbon atoms.Each member of the alkane series differs by one CH2 group, creating a predictable pattern in their properties.Next are alkenes, which contain a carbon-carbon double bond.Let's examine the molecular structure of ethane, which has only single bonds.Compare this to ethene, which has a distinctive double bond between the carbon atoms.These functional groups determine the chemical properties of each series.Let's examine combustion reactions, which occur when hydrocarbons react with oxygen.Here's methane, CH4, which has one carbon atom bonded to four hydrogen atoms.When methane combusts with oxygen, it produces carbon dioxide and water, releasing energy.Now let's look at addition reactions, which involve breaking double bonds.Here's ethene, which has a double bond between two carbon atoms.When bromine approaches the double bond, the pi bond breaks and each bromine atom attaches to a carbon.The final product has single bonds between carbons and bromine atoms on opposite sides.