1. Tyron Alejandro Daisenera Brooke Melisa Rayshawn Angela Telvins
Door into class
Promethean Board
Mr. Jhaveri’s desk
Tyron
Alejandro
Daisenera
Brooke
Melisa
Rayshawn
Angela
Telvins
Brandon
Sundiata
Couryanne
Jared
Samantha
Carlise
Raeshante
Danielle
Noor
Thanh
Haneen
Eman
Ivan
Johanna
Jose
Terrell
Jhoann
Taylor
Shakema
Toreion
Jacquelyn
Jasmine
Larry
Ronisha
Keith 1

2. What is the atomic number of silicon (Si)?
Catalyst – February 32, 2010
What is the atomic number of silicon (Si)?
How many protons, neutrons, and electrons does sodium (Na) have?
Who discovered the electron?
I hyperlinked the picture of the stopwatch to

3. Today’s Agenda Catalyst Bohr Models! Work Time
Groups of the Periodic Table
Exit Question

4. Today’s Objectives
SWBAT draw Bohr models of the first 20 elements on the periodic table.
SWBAT describe the major groups on the periodic table.

5. Navigating the Periodic Table
Atomic Number (small whole number)
Element Symbol
(letters)
Atomic Mass
(big decimal number)

6. Atomic Number is an Element’s ID Number
Like your social security number or a professional athlete’s jersey number, the atomic number of an element identifies that element

7. Navigating the Periodic Table
What is the atomic number of…
Lithium?
Magnesium?
Silver?
Boron? 3 12 47 5

8. Draw the bohr model for this element

9. Draw the bohr for this element

10. Bohr Models of Atoms
Key Point #1: A Bohr model depicts an atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus
16 p+
16 no
Sulfur: 16 protons
16 neutrons
16 electrons

11. Energy Levels
Key Point #2: Energy levels are paths around the nucleus where electrons travel
Energy levels are also known as orbits/orbitals
Energy increases as you move further from the nucleus

12. Valence Electrons
Key Point #3: Valence electrons (ve-) are electrons in the outermost energy level
They are the furthest from the nucleus
An atom could have 1 ve-, 2 ve-, 3 ve-, etc.

13. Steps to Making a Bohr Model
Determine protons, neutrons, and electrons are in the atom
Draw the nucleus (circle) with # p+ and # no inside
Draw the first energy level (circle around nucleus) and draw up to 2 dots (electrons)
If needed, draw second energy level (second circle) and draw up to 8 dots (electrons)
If needed, draw third energy level (third circle) and draw up to 8 dots (electrons)
If needed, draw fourth energy level (fourth circle) and draw up to 18 dots (electrons)

14. Practice Time – 20 minutes
Draw Bohr Models for the first 20 elements on your notes sheet
We will do a few together first
Remember, find the number of protons, electrons, and neutrons first…then get drawing!
Finish sheet on your own time

15. Which Atom am I? P N Ca

16. Which Atom am I? P N Ne

17. Which Atom am I? P N O

18. Which Atom am I? P N B

19. Which Atom am I? P N Si

20. Find the atomic number of this element

21. Periodic Table Basics You are about to begin a journey to find the
secrets of the Periodic Table
The Periodic Table is a majestic tool used by
scientists all over the world
Are you ready?
Let’s go.

22. The Periodic Table
Key Point #1: The periodic table organizes the elements into many different groups based on physical and chemical properties.
We will learn about the major ways to group the elements – by…
Family
Metals/metalloids/nonmetals
Valence Electrons
Atomic size
Electronegativity

23. What does PERIODIC mean?
Key Point #2: Periodic means that there is some kind of pattern.
In the Periodic Table, there are numerous patterns
What about in regular life? How could you group the following items in different ways?

25. Periodic Law
Periodic Law is the statement that there is a periodic (patterned) repetition of chemical and physical properties of the elements when they are arranged in increasing atomic number

26. Periodic Table Basics
Vertical columns on the periodic table are called groups
Horizontal rows on the periodic table are called periods
Elements are in order of atomic number
Elements are grouped according to electron configuration

27. Metal, Nonmetals, and Metalloids
Are bad conductors of electricity and heat
No Luster
Are brittle (break easily)
Nonductile
Solid, liquid, and gas at room temperature
Are good conductors of electricity and heat
Are shiny (have luster)
Are malleable (can be beaten into thin sheets)
Are ductile (can be stretched into wire)
Solid at room temp (except Hg)
Metalloids are elements that have properties that are in between metals and nonmetals.

28. Metals vs. Nonmetals
Based on your real life experience label the following as metals or nonmetals
Copper
Oxygen
Silver
Neon
Gold
Helium
Platinum
Carbon (graphite, diamonds)
Iron

29. Metals, Metalloids, and Nonmetals

30. Metal vs. Nonmetals
Two parents are designing a child’s room. They know that children are very curious and want to touch everything, including the heating vent. The vent is currently made of iron, which of the following elements should the parents use to remake the vent so it does not conduct heat well?
Silver
Zinc
Calcium
Carbon
Chromium
An electrician ran out of wire and needs to buy some more to finish the electrical circuits in a home. At the store he has the choice of buying the following elements. Which should he buy?
Carbon
Hydrogen
Fluorine
Gold
Sulfur

31. Major Families Noble Gases Alkali Metals Halogens
Alkaline Earth Metals H He Be B C N O F
Transition Metals
Lanthanides Ce Th
Actininides

32. Notice any trends???
Look at your Bohr models for the first 20 elements
What trends (patterns or similarities) do you notice along the periodic table?

33. Schrödinger Equation and Atomic Orbitals
Key Point #3: There are 4 atomic orbitals… s p d f

34. A Saying to Remember the Four Atomic Orbitals
some pirates die fiercely!

35. The s Orbital One s orbital in each energy level
The s orbital is shaped like a sphere

36. The p Orbital Three p orbitals in each energy level
(starting in the 2nd energy level!)
Shape looks like dumbells or bowties

37. p and s Orbitals Side by Side

38. Start in the 3rd energy level! Shape looks like eggs or flowers
The d orbital
Five d orbitals
Start in the 3rd energy level!
Shape looks like eggs or flowers

39. The f orbital
Seven f orbitals - start in 4th energy level

40. Electron Configuration
Knowing where electrons are in an atom helps us determine how that atom will behave in a chemical reaction
We write electron configurations for atoms of each element to help us map out the electrons
Small number =Number of electrons
1s2
Letter=orbital
Large number= energy level

41. Exit Question Draw the Bohr model for Lithium (Li).
is the periodic table called the “periodic” table?
What family/group is your project element in? How many valence electrons does it have?
Homework: Quiz 2.1 Tracking, Periodic Table Assignment, Work on Project