1. Atomic Structure Protons- positively charged, found in nucleus
Neutrons- neutral, found in nucleus
Electrons- negatively charged, found in electron cloud, In a neutral atom equal to the number of protons
Subatomic particles- smaller particles that make up an atom

2. Isotopes
Different atoms of a specific element can have different numbers of neutrons
Ex Hydrogen atom has 1 proton, but can have 0, 1, or 2 neutrons

3. Ions 1 proton – 2 electrons = -1 charge
An atom with a positive or negative charge
An atom with a different number of electrons then protons
Gaining or losing electrons in order to increase stability (octet rule)
Charge is equal to protons-electrons
1 proton – 2 electrons = -1 charge

4. Diagram of an Atom (Bohr Model)
Electron cloud
Neutron
Electron
Proton
Nucleus

5. Guidelines 5th energy level holds 50 electrons
Protons and neutrons go in the center
Electrons go in electron cloud (we wont go past 18 electrons)
1st energy level holds 2 electrons
2nd energy level holds 8 electrons
3rd energy level holds 18 electrons
4th energy level holds 32 electrons
5th energy level holds 50 electrons
6th energy level holds 72 electrons
7th energy level holds 98 electrons

6. components
Electron Shell
Electrons
protons
neutrons