Carbon is the main ingredient of organic molecules
~carbon skeletons and functional groups 
-Carbon only has 4 electrons on it's highest energy so they bond with other atoms
-The carbon-based molecules are organic molecules
-the non carbon-based molecules are inorganic molecules.
-organic molecules that are composed of carbon and hydrogen is hydrocarbons
-hydrocarbons are important in our lives
-A group of atoms within a molecule that interacts in predicatble was with other molecules are called a functional group
-Organic molecules have many shapes like strasight chain, single, double and tripple bond
~Monomoers and Polymers
-monomers is composed of large molecules, that are built from many simillar, smaller molecular units.
-The cell link monomers together into long chains called polymers
-Polymers take important role in our life and ion environment and you will find various kinds of polymers that are built from a collection of fewer that 50 kinds of monomers -Four important large molecules are carbohydrates, lipids, proteins, nucleic acid.
~Building and breaking polymers
-building polymer can be called is dehydratioon reaction because when you form a chain, you remove water from it
Concept check
1.Draw a molecule that has a three carbon skeleton and a hydroxyl group on the middle carbon.
2. Explain the connection between monomers and polymers.
Monomers are small molecule units and when these monomers link to each other, they became polymers. Polymers are straight chains of mnomers. So many monomers in straight chain=polymers.
3.What molecule is released during construction of a polymer? What is this reaction called?
Water molecule is released during the construction of a polymer.
4. Draw at least three ways in which five carbon atoms could be joined to make different carbon skeletons.
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