Atoms and subatomic particles
A way to classify the elements
Periodic table
Has the atomic number 1
Hydrogen
Particles are closely packed together in a regular arrangement
Soild
The smallest unit of matter, It cannot be be broken down chemically
Atoms
Has the atomic number12
Magnesium
The bumping of particles resulting in a force which causes the change of direction
Collisions
A mental picture or story about an object or process
Model
Has the atomic number20
Calcium
Particles moving from a high concentration to a low concentration
Diffusion
Found in the nucleus
Protons and neutrons
The symbol of gold
AU
The phase change between a solid and a gas
Sublimation