1. Describing the Structure of ATOMS

2. MATTER Anything that has volume and mass
Everything that exists is matter, and is made of ATOMS

3. ATOM
The smallest unit of an element that has all of the properties of that element containing a nucleus within an electron cloud.

4. MODEL OF THE ATOM
A conceptual model of the atom showing a small positively-charged nucleus surrounded by orbiting electrons, much like the planets orbit the Sun in our Solar System.

5. NUCLEUS
Positively charged protons occupy space within the nucleus and cause the nucleus to have an overall positive charge
The tiny, dense, positively-charged region in the center of an atom; made up of protons and neutrons

6. ELECTRON CLOUD
Negatively charged electrons occupy
the space within the electron cloud and
cause the electron cloud to have an
overall negative charge
All of the area of an atom, outside the nucleus where electrons are found

7. SUBATOMIC PARTICLES (the parts that make up the Atom): PROTON, p+
A positively-charged subatomic particle of the nucleus of an atom that contributes to the mass of the atom

8. SUBATOMIC PARTICLES: (the parts that make up the Atom): NEUTRON, n0
A subatomic particle of the nucleus of an atom that is without charge that contributes to the mass of an atom

9. SUBATOMIC PARTICLES: (the parts that make up the Atom): ELECTRON, e-
A negatively-charged subatomic particle of the electron cloud that is involved in the formation of chemical bonds

10. ELECTRICAL CHARGE
Each electron has a negative charge
Each proton has a positive charge
Neutrons are without charge
A form of charge, designated negative, positive, or neutral (has no charge) that is found on the subatomic particles that make up all atoms.