A lesson about all elements

Agenda

• Atomic number
• Compounds
• Carbon

The atomic number of an element corresponds to the number of protons an atom has.

The majority of elements are metals.

Metals are

• Lustrous (shiny)
• Good conductors of heat and electricity

When atoms of two or more elements react, a chemical compound is formed.

A particular compound will always have the same composition.

For example, a water molecule always consists of two hydrogen atoms and an oxygen atom.

Compounds that are mostly carbon and hydrogen are organic compounds.

A mixture contains more than one substance, but creating a mixture is not the same thing as a chemical reaction.

Objectives

• Understand what at compound is
• Be able to explain the importance of carbon

Types of Organic Compounds

• Carbohydrates
• Lipids
• Proteins
• Nucleic acids

A mono-saccharide is a simple sugar like fructose or glucose.

Glucose (C6H12O6) is used by cells for energy

(CH2O)n

Fructose and glucose have the same chemical formula but the atoms are arranged differently. They are isomers.

If two monosaccharides bonds together, they form a disaccharide. Table sugar (sucrose) is an example.

Monosaccharides and disaccharides are simple sugars. They are a source of energy.

Polysaccharides store energy AND for support structures.