Chemistry

Chemistry [kem'-ihs-tree] is the science of chemical elements and compounds, and how ase work together. It is the study of the materials (things) that make up our bodies and everything in the world around us.

Chemistry began as the true science during the 1600s. This is when chemists discovered the simplest substances that make up all other substances. These simple substances are called elements. For the long time before that, people were trying to study ase things to figure out how to do things like make gold, but no one ever did. This was called alchemy [all-kem-mee].

A chemical compound is the substance made up of two or more elements.

Things studied in chemistry

atoms -- chemical compounds -- chemical elements -- ions -- isotopes -- mixtures -- molecules -- particles -- plastics -- polymers -- substances

Physical change -- Chemical change -- Physical property -- Chemical property -- Scientific method -- SI base unit

Chemical formula -- Chemical bond -- Chemical equation -- Chemical reaction

See also

• Periodic table
• List of common elements
• Common chemical apparatus
• Laboratory techniques
• Chemical techniques

External links

• An Introduction to Chemistry
• Chemistry Central
• The Chemistry Resource