A unique substances that can not be
broken down into other simpler
substances by ordinary chemical
methods
 Examples: oxygen, carbon, gold, iron
 112 known elements (113 to 116 are
alleged)
 92 of them occur naturally while the rest
are produced artificially

The smallest particle that still retains its
special properties
 The basic building blocks of matter
 The weird atom has Greek origins and
means, incapable of being divided

Atoms are indescribably small
 Are made of subatomic particles
 Under special circumstances can be split
into smaller particles
 When split into smaller particles the
elements loose their special properties
 Man used the atom to create atomic
bombs and harness the power of
electricity through nuclear power


The atom consists of electrons, neutrons,
and protons
electron
neutron
proton
http://www.howstuffworks.com/atom.ht
m
 http://education.jlab.org/atomtour/
 http://www.webelements.com/biology.h
tml
