> wiki   Explore:web images videos games  

Chemical formula

KidzSearch Safe Wikipedia for Kids.
Jump to: navigation, search
Chemical formula of hydrogen peroxide, H2O2
Chemical formula of methane, CH4
Chemical formula of glucose showing the bonds between atoms

A chemical formula (or molecular formula) is one way chemists describe a molecule. The formula says what atoms, and how many of each type, are in the molecule. Sometimes the formula shows how the atoms are linked, and sometimes the formula shows how the atoms are arranged in space.

The letter shows what chemical element each atom is. The subscript shows the number of each type of atom. For example, hydrogen peroxide has the formula H2O2. Methane has one carbon (C) atom and four hydrogen atoms; the chemical formula is CH4. The sugar molecule glucose has six carbon atoms, twelve hydrogen atoms and six oxygen atoms, so its chemical formula is C6H12O6.

Chemical formulas are used in chemical equations to describe chemical reactions.

The 19th-century Swedish chemist Jöns Jacob Berzelius worked out this system for writing chemical formulas.

Further reading

  • Ralph S. Petrucci, William S. Harwood, F. Geoffrey Herring (2002). "3". General Chemistry: Principles and Modern Applications (8th ed.). Prentice-Hall. ISBN 0131988255
      . ASIN B000ZI5Z2K. 

Help Improve This Page: Please contact us to become an approved KidzSearch editor and provide your credentials. Provide feedback on this article in our Chemical formula Forum