1. Topic: Bohr Model Date: 11/19/2012
Cornell Notes: Please take out your notebook and properly set up your paper.
Topic: Bohr Model
Date: 11/19/2012

2. Topic: Bohr Model Essential Questions:
What does an atom’s structure look like?
How are electrons configured in atoms?

3. Subatomic Particles Review
What are subatomic particles?
How do we determine the number of Subatomic Particles in an atom?
The parts that make up an atom.
PEN: Protons, Electron, Neutrons
Atomic Number= # of protons & electrons (in a neutral atom)
Atomic Mass= #protons + # neutrons
Mass
# Protons

4. 1 What is the Bohr Model? P+: 1 E-: 1 N0:1-1= 0
Bohr’s Model was used to explain the energy of atoms
Only works for Hydrogen, but is a good visualization for atomic structure
What is the Bohr Model? 1
P+: 1
E-: 1
N0:1-1= 0
nucleus
1p+ e
Electron Energy Shell

5. Hydrogen: + -

6. Constructing a Bohr Model
Determine # protons & Neutron draw them in inner circle
Determine # Electrons place in energy levels as follows
1st energy level= 2e- max
2nd energy level= 8e- max
3rd energy level= 18e- max
How do we make a Bohr Model?

7. Nitrogen-14 Bohr Model Practice P+ E- N0
Determine # protons & Neutron draw them in inner circle
Determine # Electrons place in energy levels as follows
1st energy level= 2e- max
2nd energy level= 8e- max
3rd energy level= 18e- max P+ E- N0

8. Helium:

9. Lithium:

10. Beryllium

11. Let’s Talk About Valence Electrons
What are Valence Electrons?
What’s the Octet Rule?
Electrons in the outer most shell
Determine elements chemical properties
Atoms gain, lose, or share electrons in order to have 8 valence electrons
How do valence electrons affect an element’s reactivity?