7. •COMPOUND
A kind of matter made of a chemical combination
of two or more types of atoms.
Every compound has a formula that shows how
many atoms of each element are in the
compound.
For example, H2O
11. • Hydrogen Gas H2 • Oxygen Gas O2
•Let's start with a couple of Molecules
12. • Methane CH4
• Silicon Dioxide SiO2
• Ammonia NH3
• Propane C3H8
•Now for some compounds
13.
14. •What is the difference between a compound and a
molecule?
• A molecule is formed when two or more atoms join
together chemically.
• A compound is a molecule that contains at least two
different types of atoms.
• All compounds are molecules but not all molecules are
compounds.
15.
16. •Mixtures
• Most matter in the
universe is found in
mixtures.
• A mixture is made from
two or more
substances either
elements, compounds
or both - that are not
chemically combined.
• Soil is a mixture
• The atmosphere is a
mixture of gases
20. Here you
go
Atoms of an
elementMolecules of an
element
Molecules of a
Compound
Molecules of a
Compound
Molecules of a
Compound
Atoms of an
element
Mixture of 2
compounds
Mixture of an element and a
compoundMixture of 2 elements
21. •Solutions
• A solution is a mixture in which one
substance dissolves in another.
• For example salt water.