Power Notes Bohr Models- Day 1
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Science You will Need: 1)Pencil/Pen, Colored Pencils, Highlighters or Markers 2)Log #2 – Update – Managers in charge today 3)Power Notes – Bohr Model Drawings + Density Review – 2 pages 4 sides – Bookshelf
Transcript of Power Notes Bohr Models- Day 1
Today in ScienceYou will Need:1)Pencil/Pen, Colored Pencils, Highlighters or Markers2)Log #2 – Update – Managers in charge today3)Power Notes – Bohr Model Drawings + Density Review– 2 pages 4 sides – Bookshelf
Reminders1. Test #2 Retakes – Thurs. 1/2 page of notes
2. Binder Check #2 – Due Thur at the beginning of class• Please check your grades for Accuracy- • Print Progress Notice & Get signed for Binder
3. Power Notes- Bohr Model Drawings Colored Pencils, Highlighters or Markers- must highlight notes
4. Review and Reflect on Page 1
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 or electrons, its basic characteristics, properties and how it reacts with other elements is basically the same.
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.
Bohr Model of Carbon
Neutrons = Atomic
Mass Number – Atomic Number
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.
Electron Configuration
Valence electrons
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
Remember:
Basic Configuration
Example:
Metals give away their electrons, while nonmetals take.
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
Lewis Dot Diagrams
Example:Beryllium is in Family #2
1. Shows only valence electrons2. Illustrated using ELEMENT
SYMBOL and DOTS to represent only the valence electrons.
3. Therefore Beryllium has a VALENCE of 2
Be
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.
Let’s try a couple:
LithiumRow=Protons =Neutrons =Electrons =
Lewis Dot
2
3+
7-3=4
3-
P = 3+N = 4
2-1-
Li
Let’s try a couple:
OxygenRow=Protons =Neutrons =Electrons =
Lewis Dot
2
8+
16-8=88-
P = 8+N = 8
2-6-
O
Today’s Tasks1)Power Notes- Bohr Model Drawings + Density Review– Due by Friday (There is NO time to work in class tomorrow)
2)Binder Check #2 - Due Thur• Cover Page• Table of Contents• Grade Print out
3)Test #2- ½ page of notes, done by hand, front side only – Due Thur.
Homework1)Power Notes– Due by Friday(There is NO time to work in class tomorrow)
2)Binder Check #2 –Due at the beginning of class on Thur.
3)Test #2- ½ page of notes, done by hand, front side only – Due Thur.
Do You see HOW the periodic table and the Atomic Structure are RELATED?
