The document provides instructions and assignments for a science class, including materials needed, tests and assignments to complete, due dates, and topics that will be covered such as the Bohr model, electron configuration, valence electrons, drawing Bohr models and Lewis dot diagrams. Students are given examples and review questions to complete for each topic. The document outlines the coursework and assessments for the science unit on atomic structure and the periodic table.

1. Today in Science
You will Need:
•Pencil, Colored Pencils, Highlighters or
Markers
•Power Notes – Classification of Matter
–Part 2 – 2 page 4 sides-Bookshelf

2. Check Date Date Name of Assignment Possible Earned
Off Given Due Pts. Pts.
3/15 3/15
Test #2 Part 1 (on-line) 95
3/16 3/16 Test #2 Part 2 (written),
155/8/20
Extra Credit, Notes
Test Corrections & 40
3/19 3/22 Signature
3/19 3/23 STAR CARDS #1-30 60
Power Notes –
3/19 3/21 Classifications of Matter &
Periodic Table - Overview
Test Retakes starting Thur.
Mar. 22 nd until Thur. Mar.
29 th

3. Topic:
Bohr Model vs. Electron Cloud
Quantum Numbers
Example

4. Electron Configuration
Valence electrons

5. Valence and the Periodic • The columns or families each
element is located in tells you the
Table number of valence electrons for
families 1, 2…..13,14,15,16,17
Transition Elements and 18
- Elements in Family 1 have 1
Example: valence electrons
- Elements in Family 2 have 2
valence electrons
- Elements in Family 13 have
3 valence electrons
2. The pattern continues up to
Family 18
3. The pattern DOES NOT occur
for the Transition elements
(short columns)

6. Remember: Metals give away their electrons, while
nonmetals take.
Basic Configuration •The Periodic Table Connections –
1st 3 rows only
-Rows = # of shells or levels
around the nucleus
-# of elements in each row = # of
Example: electrons found on that level
Row 1 shell around nucleus;
1= maximum of 2 electrons on shell
Row 2 shells around nucleus;
2= maximum of 8 electrons on shell
Row 3 shells around nucleus;
3= maximum of 8 electrons on shell

7. Lewis Dot Diagrams 1. Shows only valence electrons
2. Illustrated using ELEMENT
SYMBOL and DOTS to
represent only the valence
electrons.
Example: 4. Therefore Beryllium has a
Beryllium is in Family #2 VALENCE of 2
Be

8. Drawing the Bohr Models • Locate the element on the P.T.
• Record the info about the
and Lewis Dot Diagrams element.
• Draw the nucleus and write
the # of each type of
subatomic particle inside.
• Draw the correct amount of
shells outside the nucleus
based on the row #
• Start loading electrons on the
specific shells from the inside
out.
• Remember: YOU MUST load
each shell full before moving
farther out to the next shell.

9. Let’s try a couple:
Lithium
Row= 2
Protons = 3 + 1-
P = 3+
2-
Neutrons = 7-3=4 N = 4
Electrons = 3 -
Lewis Dot
Li

10. Let’s try a couple:
Oxygen
Row= 2
Protons = 8 + 6-
P = 8+
2-
Neutrons = 16-8=8 N = 8
Electrons = 8 -
Lewis Dot
O

11. Comparing Bohr Model w/
Modern Atomic Theory
Textbook pg. 169
http://dwb4.unl.edu/chemAnime/BOHRQD/BOHRQD.html
•List 3 unique qualities of Bohr’s atomic model.
•List 3 unique qualities of the Modern Atomic Theory
(Electrons Cloud)
•List 3 similarities between these two models.
Bohr Electron
Model Cloud
Both

12. Review
• Answer review questions #1-15 using
your notes to help you.
• Review and Reflect on ALL PAGES
• Due Tomorrow

13. Homework
1) Complete All Pages by Tomorrow
Due Tomorrow
2) STAR CARDS #1-30 –
Due Friday at the beginning of class