Atoms,+elements,+molecules+and+compounds

=Revision: Atoms, elements, molecules and compounds=

Atoms: The smallest particle you can get of an element is called an **atom.** Element: An **element** is a substance made of only one type of atom. It can't be broken down into simpler substances eg. Au, O 2, H 2 , Zn

Zinc

Compound : When a substance is made of two or more different types of atom it is called a **compound** eg. H 2 0, H 2, SO 4

Molecules: When atoms bond together they make **molecules** eg. CO 2.

picture resources: simple.wikipedia.org en.wikipedia.org compoundsforkids.wordpress.com world-builders.org

Atoms:

 * Here are some examples of atoms:
 * Fe: Iron
 * Ne: Neon
 * H: Hydrogen
 * Cu: Copper
 * Li: Lithium
 * Mg: Magnesium
 * * note: all elements are atoms when they are by themselves
 * Absolutely everything is made of atoms

Elements:
 * Gold is an **elements** simplest form
 * * for examples: see The Elements page

Molecules:
 * Here are some examples of **molecules** of compounds:
 * H 2 SO 4 = Hydrogen (2 lots) Sulphur (4 lots)
 * P b NO 4 = Lead Nitrate
 * CO = Carbon monoxide
 * HC L = molecules

Compounds:
 * Here are some examples of **compounds:**
 * H 2 SO 4 = Sulphuric acids
 * C 2 H 5 0H = Alcohol
 * H 2 O = Water
 * NH3 = Ammonia

Good links for information on **atoms**, **elements,** **molecules** and **compounds:** [] [] [] [] []