The document defines key chemistry terms including atoms, molecules, elements, compounds, mixtures and solutions. Atoms are the smallest unit of matter that cannot be divided further. Molecules are formed when two or more atoms combine chemically. Matter is made up of elements, compounds, mixtures and solutions. Elements are made of the same type of atom, compounds contain two or more types of atoms bonded together with a specific chemical formula. Mixtures contain substances that are not chemically combined, while solutions occur when a substance dissolves evenly in another.

1. Atoms, Molecules,
Elements, Compounds,
Mixtures & Solutions!

2. •ATOM
The smallest building unit of matter which can’t
be divided.

3. •MOLECULE
Made from more than one atom
combined together.

5. •Matter is divided into 4 groups
*ELEMENTS
*COMPOUNDS
*MIXTURES
*SOLUTIONS

6. •ELEMENT
Its molecule is made of the same type of atom
combined together.

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

9. Let’s Build Some
Molecules
And
Compounds!
This activity is for illustration only

10. Element
Element
Symbol
Color of
Gummy
Hydrogen H yellow
Carbon
C green
Oxygen
O blue
Silicon
Si black
Nitrogen N red

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

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.

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

17. Is this a
mixture?
Why?

19. Can you
do it
yourself?

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.

22. Which of the following is a solution?