1. Today in Science
You will Need:
1)Pencil/Pen, Colored Pencils, Highlighters
or Markers; Periodic Table – Pgs. 196-197
2)Log #3 – Bookshelf- update
3)Power Notes – Bohr Model Drawings +
Density Review– 1 pages 2 sides –
Bookshelf = This is only Part 1
4)Group Debrief

2. Reminders
1. End of the Quarter is Friday, May 28th
2. Housekeeping – Debrief? Grade Print out
3. Binder Check #2 – Due Wednesday at the
beginning of class
4. Minimum Days on Tuesday and Thursday
of this week– 12:10 Dismissal
5. Power Notes- Bohr Model Drawings
Colored Pencils, Highlighters or Markers-
must highlight notes; Periodic Table
6. Review and Reflect on Page One Only

3. 1) Put your name, date and period at the
top of the page.
2) Fold you paper in half
3) Left Column Title: What Went Well
4) Reflect on the cooperative experience;
what positive things did you hear, feel,
see by working in a group.
5) Please write a minimum of 3 things that
went well in your group.

4. 1) Right Column Title: What Could Go
Better
2) Reflect on the cooperative experience;
without naming names, what things did
you hear, feel, or see in your group that
did not go well.
3) Please write a minimum of 3 things that
could have gone better.
4) We only have control of how we
respond, what could have been done to
improve the situation?

5. Capture in 5-6 sentences:
1) I feel cooperative groups……….
2) In my life I know I will need to depend on
other to …………….
3) I also know people will respond to me
based on ……………
4) In a cooperative group it is always
important that ………..
5) I don’t understand or I do understand
why cooperative groupings are important
because ………..
Highlightthe starters

6. Reminders
1. End of the Quarter is Friday, May 28th
2. Housekeeping – Debrief? Grade Print out
3. Binder Check #2 – Due Wednesday at the
beginning of class
4. Minimum Days on Tuesday and Thursday
of this week– 12:10 Dismissal
5. Power Notes- Bohr Model Drawings
Colored Pencils, Highlighters or Markers-
must highlight notes; Periodic Table
6. Review and Reflect on Page One Only

7. Bohr Model Drawings
The concept of elements has been around
since ancient times. We now know that each
element has its own unique number of
protons. Although each element can have a
varying amount of neutrons(isotope) or
electrons(ion), its basic characteristics,
properties and how it reacts with other
elements is basically the same.

8. Bohr Model Drawings
Neils Bohr is the scientist responsible for
the atomic model that looks very much like
our solar system. The Periodic Table not
only tells us about each individual atom
but is also set up to show us how to draw
the Bohr Model….well, at least for the first
three rows.

9. Bohr Model Drawings
The Bohr model is helpful in not only
understanding the electron configuration
but for also understanding why and how
some elements will bond with other
elements.
-Magic # is 8,
-Magic # is 2 for H and
He

10. Bohr Model of
Carbon
Atomic # = Protons “+”
and Electrons “-” if neutral
Atomic Mass = Sum of
Protons and Neutrons

11. Electron Configuration
Valence electrons

12. Valence and the Periodic
Table
Example:
1. The columns or families each
element is located in tells you
the number of valence
electrons for families 1,
2…..13,14,15,16,17 and 18
- Elements in Family 1 have 1
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)
Transition Elements
REVIEW
Remember: Metals give away their electrons, while nonmetals

13. Basic Configuration
Example:
1.The Periodic Table Connections
– 1st
3 rows only
-Rows = # of shells or levels
around the nucleus
-# of elements in each row = # of
electrons found on that level
Row
1 =
1 shell around nucleus;
maximum of 2 electrons on shell
Row
2 =
2 shells around nucleus;
maximum of 8 electrons on shell
Row
3 =
3 shells around nucleus;
maximum of 8 electrons on shell

14. Lewis Dot Diagrams
Example:
Beryllium is in Family #2
1. Illustrated using elements
Chemical Symbol and DOTS to
represent its’ VALENCE
electrons.
2. Beryllium has a VALENCE of 2
Be
1
2
3
4
5
6
7
8

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

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

17. Let’s try a couple:
Magnesium
Row=
Protons =
Neutrons =
Electrons =
Lewis Dot
3
12
+
24-
12=1212-
P =
12+
N = 12
2-
8-
Mg
2-

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

19. Homework
1) Review and Reflect on
Page one of Power Notes –
Bohr Model Drawings
2)Minimum Day tomorrow –
Per. 1,3,4,5,7
3)Binder Check #2- Due
Wed.