Write the atomic # & atomic mass for one of the following elements:

http://www.yeousch.com/community/threads/science-jokes-for-the-fellow-nerdlings.7127/

Agenda

Energy Levels Bohr Diagrams Review Game

The most frequently used models…

Two atomic models are used most frequently:• Schrödinger

• Bohr Schrodinger’s is the most accurate, but

Bohr’s is more simplistic Bohr’s model is accurate for simple

atoms

Electron Energy

Bohr discovered that e- can be found at different energy levels, but can’t be found between energy levels.

The energy level the e- is usually found in is known as the ground state.

Excited e-

If an e- gains energy, it can move to another energy level • The e- is now in the excited state

Eventually the e- will loose its energy and return back to the ground state.• When this happens light is emitted

• Different elements give off different colors (fireworks)

Energy and the Atomic Model

Using this information about energy, Bohr created his own atomic model

e- closest to the nucleus have the least amount of energy

e- farthest from the nucleus have the most

Energy Levels (Shells)

Bohr labeled these energy levels as;• k, l, m, n, o, p, q

Shell k can only have 2 e- The rest can have 8 e- The lower energy levels must be at

capacity before e- can move to higher energy levels

What this means…

If you had 16 e- You can do this for

every element on the periodic table

This led to the Bohr Diagram

K L M

2 e- 8 e- 6 e-

http://chemistryiseasy.com/

Steps to create a Bohr Diagram

1. Find the number of protons.

2. Find the number of neutrons.

3. Find the number of electrons.

4. Draw a circle to represent the nucleus.• Insert the number of protons and neutrons.

5. Draw enough energy shells to house all of the electrons.

Examples

Review Game

Reviewing Atomic Structure and Bohr Diagram practice

First things first…

Wednesday is the start of Baseball Playoffs!

http://ladylovespinstripes.com/

Rules of Baseball Science

You will be split into two teams Each team will send a player “to bat” The batting player has the option of:

• Single

• Double

• Triple

• Homerun If you miss the question – out If you take more than 10s to answer - strike

Baseball Science

http://nesn.com/fenway-park-stadium-guide/