1. Everything is made up of __atoms_______; even you!
An atom is…
The smallest unit of _Matter____.
Guide students in taking notes on their printed slides. Definition: An atom is the smallest unit of matter.
So what is that?
Anything that has __Mass___ and takes up __space_____ is matter!
Everything is made up of __atoms_______; even you!

2. An Atom is made of…
___Electrons_____ – negatively charged particles that orbit the nucleus (center).
Electrons
Neutrons
Protons
____Neutrons_____ – particles that are neutral or have no charge. These are inside the nucleus.
___Protons______ – positively charged particles inside the nucleus
Protons in the atom’s nucleus attract the electrons and keep them in orbit around the nucleus.

3. Atoms are small
Atoms are so small that they cannot be ___seen______with regular microscopes. There are special microscopes that can give you a feel of what atoms look like.
The number of protons in an atom determine what type of ____element______ it is. This is called the Atomic Number.
So that means all the elements on the Periodic Table are different types of atoms (with different numbers of protons and electrons).

4. A molecule is made of at least two atoms.
Water molecule
A ___compound_____ is a molecule that contains two different types of atoms (elements).
NOT ALL Molecules are Compounds
If the molecule is made up of two or more of the same type of atom it is still an element O2 or H2 are still elements