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Elements, Compounds and Mixtures
Sarah Jones

csironewsblog.com
Atoms
All substances are made of ATOMS.

Water – hydrogen and oxygen atoms
Plastic – carbon and hydrogen atoms
Plants – ca...
Elements
• There are about 100 substances that are made
up of just one type of atom.
• These are elements.

Helium

Carbon...
Molecules
• In some elements, the atoms are joined in
groups of two or more – this is called a
molecule.

O2
Other element...
Symbols for Elements
H – Hydrogen
C – Carbon
F – Fluorine
O – Oxygen
N – Nitrogen
I – Iodine

Li – Lithium
Al – Aluminium
...
Compounds
• A compound is the substance produced when
two or more elements combine in a chemical
reaction – they are also ...
The Periodic Table
• The periodic table is a list of all of the known
elements. The elements are arranged according
to the similarities in th...
http://www.infoplease.com/dk/science/encyclopedia/periodic-table.html
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Elements, Compounds and Mixtures

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Elements, Compounds and Mixtures

  1. 1. Elements, Compounds and Mixtures Sarah Jones csironewsblog.com
  2. 2. Atoms All substances are made of ATOMS. Water – hydrogen and oxygen atoms Plastic – carbon and hydrogen atoms Plants – carbon, nitrogen, hydrogen, oxygen and sulfur atoms
  3. 3. Elements • There are about 100 substances that are made up of just one type of atom. • These are elements. Helium Carbon Copper
  4. 4. Molecules • In some elements, the atoms are joined in groups of two or more – this is called a molecule. O2 Other elements that contain atoms joined in molecules are hydrogen, nitrogen, chlorine and bromine.
  5. 5. Symbols for Elements H – Hydrogen C – Carbon F – Fluorine O – Oxygen N – Nitrogen I – Iodine Li – Lithium Al – Aluminium He – Helium Pb – Lead Au – Gold Ag - Silver
  6. 6. Compounds • A compound is the substance produced when two or more elements combine in a chemical reaction – they are also molecules. H2O CO2
  7. 7. The Periodic Table
  8. 8. • The periodic table is a list of all of the known elements. The elements are arranged according to the similarities in their properties.
  9. 9. http://www.infoplease.com/dk/science/encyclopedia/periodic-table.html

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