The document discusses the historical development of atomic theory, starting with Democritus's concept of 'atomos' as indivisible particles. It then outlines John Dalton's model from the early 1800s, which states key properties of atoms, including their indestructibility and the formation of compounds. Additionally, it explains fundamental concepts in chemistry, such as particle movement, mass, and diffusion.

1. All that Matter

2. Lets go back in time

3. Democritus
 460 BCE to 370 BCE
 Greek Philosopher
 Cut an object into smaller pieces there
would be a point where you could not cut
anymore.
 The smallest piece was called……….
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4. Atomos or Atoms
Atomos = Indivisible

5. John Dalton
 Early 1800’s
 From England
Dalton Model for Atoms
1. Atoms can not be created or destroyed
2. Atoms are identical are elements
3. Atoms combined form compounds
4. If combine in WHOLE number ratio they are molecules

6. Chemistry
 Looking at tiny particles and their interactions
This list goes further
Particles are too small to be seen
Particles are always moving
Particles have mass
Particles can join to make larger particles

7. Chemistry part 2
When combined , there masses
add together
There spaces between particles
Forces hold particles together to
stop them from separating

8. Kinetic energy
All matter has
Kinetic energy
The more energy the
more movement

9. Diffusion
 The rate at what particles spread