1. Atoms, compounds and elements
Mrs. De Luna

2. Atom
An atom is the smallest , tiniest , indivisible unit of ordinary matter.

3. Element
one of the basic substances that are made of atoms of only one kind and that cannot be separated because it is a pure substance

4. compounds
a substance that is composed of two or more separate elements with different atoms
Example is water – composed of the elements hydrogen and oxygen ; contains hydrogen atoms and oxygen atoms

5. Puzzle activity Your group is given a box of puzzle to put together.
Once done, you are to tell, which part represents the atoms, elements, compounds and matter.
Work collaboratively and avoid arguments.
The more pieces put together, the higher grade you get!

6. Dalton’s Atomic Theory
The first part of his theory states that all matter is made of atoms, which are indivisible.
The second part of the theory says all atoms of a given element are identical in mass and properties.
The third part says compounds are combinations of two or more different types of atoms.
The fourth part of the theory states that a chemical reaction is a rearrangement of atoms.