A romance is a relationship between two people who are in love with each other but who are not married to each other. After a whirlwind romance the couple announced their engagement in July. ...a holiday romance.
Hydrocarbons are compounds made from carbon and hydrogen atoms joined by covalent bonds. Alkanes are saturated-they have only single bonds.Alkenes have a double bond-they are unsaturated. Alkenes react with brown bromine water and decolourise it, but alkanes do not.Alkenes can act as monomers.ydrocarbons are compounds made from carbon and hydrogen atoms joined by covalent bonds. Alkanes are saturated-they have only single bonds.
There are three types of unsaturated hydrocarbons: alkenes, alkynes and aromatic hydrocarbons. Alkenes have one or more carbon-carbon double bond. Alkynes have one or more carbon-carbon triple bond, and aromatic hydrocarbons have a benzene or aromatic ring in their structure.elow are examples of the unsaturated hydrocarbons. On the left is the chemical structure of acetylene, which contains a triple bond, and on the right is the chemical structure of styrene, which contains several double bonds.