You Will Need:1.Pencil, Text Book- Periodic

Table, Colored Pencils2. Bohr Models vs. Wave

Model & Lewis Dot 2 pages-3 sides (Pick-up from bookshelf- Please Staple)

4. Log #3 - Update

Please SCHEDULE:

1. To take Part 2 for the 1st time OR to

2. Retake Test #3

• Part 2 – 101/145 or lower

3. Parent Signature and Corrections – due Wed.

• Please Pick up your belongings

1. Move to the back of the room

2. Take your new seat when your name is called

• Decide on your new job

• Manager, Materials Manager, Timer Designer, Oral Presenter

1. The substances on the left side of a periodic table are most likely this class of elements….

2. Which subatomic particle determines the charge of the atom?

3. The scientist who believed the atomic structure resembled the solar system?

4. The lease reactive elements on the Periodic Table are the ______________.

5. The type of electrons that determine how an atom will bond to another atom are the ___________________.

6. The subatomic particle responsible for determining the atom you are looking at are the ____________.

7. Why are elements’ atoms on the periodic table neutral?

8. When an element’s atomic structure has more or less neutrons we call this an ______.

9. What is the valence of Nitrogen? How do you know?

10. How many more electron bonds would Nitrogen need to have a full outer shell?

Timer Designers: In charge of today’s lesson on the computer

The concept of elements has been around since ancient times. We now know that each element has its own unique number of protons.

You can also tell the elements apart because of their different properties.

Scientists still use models to help them better understand the structure of the atom and the way they will interact.

Two types of models are the Bohr Model and the Wave Model or Electron Cloud Model.

Bohr Model Wave Model or Electron Cloud Model

http://www.chemicalelements.com/elements/na.html

Go to this hyperlink on LearningPoint (Bohr Model) and draw the Bohr Model for Sodium. (label the subatomic particles)

http://www.dipity.com/ne12mlinlow/Inlow-Hollerbush-Heim/

Go to this hyperlink on LearningPoint (Electron Cloud). Scroll over and click on Electron cloud. Illustrate and Label the parts of a generic atom.

Similarities:

• • •.

Differences:

• •

In this section, list a minimum of three things you notice that are the same between these two models.

In this section, list a minimum of two things you notice that are different between these two models.

The Periodic Table helps us illustrate the electron configuration (Bohr Model) and the Lewis Dot Diagrams scientists also use to visualize atomic structures.

Question Answer

What is the Electron Configuration? • A model that shows specifically how the electrons are arranged in shells around the nucleus

What are valence electrons? • Electrons found on the outermost shell of the atomic structure

• Determine how the atom will bond

What is a bond? • When two or more atoms join to form a compound (different substance)

• Atoms can only bond in a specific way

Question Answer

What types of bonds are there?

• The two main types of bonds formed between atoms are ionic bonds and covalent bonds

What is a covalent bond? • formed when atoms share valence electrons.

• atoms do not always share the electrons equally

• Usually a bond between nonmetals

What is an ionic bond? • formed when one atom accepts or donates one or more of its valence electrons to another atom

• This forms IONS (atoms become attracted to each other)• Remember: Metals donate and nonmetals accept)

• Usually a bond between a nonmetal and a metal

Question Answer

How do you determine the electron configuration of the atom? (This works for only the 1st 3 rows)

• Rows the element is on = # of shells around nucleus

• To load electrons on each shell – count the number of elements in each row….this is the maximum number of electrons that can fit on that shell

• YOU MUST load the inner shell FULL before moving on to the next shell.

If the element is found in:

Row #1 = 1 shell Maximum # of electrons = 2

Row #2 = 2 shells Maximum # of electrons = 8

Row #3 = 3 shells Maximum # of electrons = 8

YOU MUST ALWAYS fill the inner most shell FULL before moving on to the next shell.

Question Answer

What about elements on rows 4,5,6 and 7?(Do not need to know this for 8th grade)

• These Bohr models include subshells, s, p,d & f

• http://www.chem4kids.com/files/elements/006_shells.html

• http://education.jlab.org/qa/electron_config.html

What is the Lewis Dot Diagram?http://www.youtube.com/watch?v=ulyopnxjAZ8&feature=relmfu

• Shows how an element will bond• Use the element symbol + the number

of valence electrons

Example: Beryllium = Family 2 = Valence of 2

BePlease correct your worksheet.

Let’s try a couple: Follow these directions to complete the next page

1. Locate the element on the P.T.2. Record the information about the element in column 1 of the

chart3. Draw the nucleus and write the # of each type of subatomic

particle4. Draw the correct amount of shells outside the nucleus based

on the row the element is found5. Start loading electrons on the specific shells from the inside out

(closest to the nucleus)6. Load each level (shell) FULL before going to the next.

(Remember: each shell has a “maximum FULL” amount.)

Element Bohr Model Lewis Dot (Symbol + Valence)

Lithium

Atomic #

Atomic Mass – Atomic #

Row =

Electrons= Protons =

Neutrons =

Before moving to the next slide…..try to do this on your own and then check your answer

Element Bohr Model Lewis Dot (Symbol + Valence)

Lithium

Atomic #

Atomic Mass – Atomic #

Neon

Atomic #

Atomic Mass – Atomic #

Row =

Electrons= Protons =

Neutrons =

2

33

7-3=

4

P = 3N = 4

21

Li

Row =

Electrons= Protons =

Neutrons =

P =N = Ne

1. Schedule Test #3 retake

2. Signed & Corrected Test #3- Due Wednesday

3. Bohr Model vs. Wave Model &

Lewis Dot – Pgs. 1-3