• Element is the simplest form of matter that has a unique set of properties.
  • It is a pure substance that cannot be broken down into different types of substances.
  • As of 2010, there are 118 known elements.
  • Ninety eight of the elements are naturally occurring on earth, while the other 20 elements have been made synthetically in a lab.
  • The names of all the elements can be found on the periodic table.
  • Several elements are very valuable while others are quite inexpensive.
  • See what elements are in the air in this simulation.
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