2930 Valence Electrons Starter Practice: Connection: Answer questions using Periodic Basics 1. What...

29 30Valence Electrons

Starter

Practice:

Connection:Answer questions using Periodic Basics1. What patterns do you see?2. What do the vertical columns have in common?3. What do the horizontal columns have in common?4. What changes move across the table from left to right?

Exit: What does the group number tell you?

Sep 17, 2014

Glue it in

after the

notes

What do you think purpose of valence electrons are?

Valence ElectronsSep 17, 2014

Application: Work on Periodic Basic coloring andquestions

Write everything unless it is written in green!!!!

StarterWhat do you think purpose of valence electrons are?

Date Lecture/ Activity/ Lab Page8/29 Syllabus /Notebook Guidelines 1-28/29 Periodic Table/ Formula 3-48/29 Tools/ Measurement 5-68/29 Lab Report/ Investigations 7-88/29 Restroom passes/Homework Log 9-109/2 Atomic Theory Research notes 11-12 9/3 Atomic Structure 13-149/4 Atomic Charges 15-16

Table of Contents

9/8 Ape Man 17-189/9 Electron Placement 19-209/10 Valence Electrons 21-229/11 Atomic Math 23-24

9/15 Periodic Table Notes 25-269/16 Periodic Basics 27-289/17 Periodic Basics II 29-30

The electrons in the outer energy level are called valence electrons

What are valence electrons?

Practice

How do we know how many valence electrons does an element have?

• The group number tells us how many valence electrons are in each element.

Atoms of elements in the same group have the same number of electrons in the outer orbitals/levels of their atoms Exceptions:

Transition elements (3-12) Helium (actually has 2 valence electrons)

Group 1 = 1 electron

Group 2 = 2 electrons

Group 8 = 8 electrons

Except for He, it has 2 electrons

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3, 4, 5, 6, 7

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Examples of Group Elements with the same # of valence electrons

87

Fr(223)

55

Cs132.905

37

Rb85.468

19

K39.098

11

Na22.990

3

Li6.941

1

H1.008 +

-

+

-

+++

-

-

-

+++

+++

-

-

-

How many electrons do each of these atoms have in their outer

orbital/level?

What group (family) do these elements belong

to?

Highlight the outer energy level

Name of element

# valence electrons

Group #

HYDROGEN

1

1

Helium

2

18

Lithium

1

1

Nitrogen

5

15

Now Let’s Try Lewis Structures1) Find your element on the periodic

table.2) Determine the number of valence

electrons.3) This is how many electrons you will

draw.

Lewis Structures• Find out which group (column) your element is in.

• This will tell you the number of valence electrons your element has.

• You will only draw the valence electrons.

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Lewis Structures1) Write the element

symbol.2) Carbon is in the 4th

group, so it has 4 valence electrons.

3) Starting at the right, draw 4 electrons, or dots, counter-clockwise around the element symbol.

C

Lewis Structures

C

1) Check your work.

2) Using your periodic table, check that Carbon is in the 4th group.

3) You should have 4 total electrons, or dots, drawn in for Carbon.

Lewis Structures

C

On your worksheet, try these elements on your own:

a) Hb) Pc) Cad) Ar

Lewis Structures

H


a) Hb) Pc) Cad) Ar

Lewis Structures

P


a) Hb) Pc) Cad) Ar

Lewis Structures

Ca


a) Hb) Pc) Cad) Ar

Lewis Structures

Ar


a) Hb) Pc) Cad) Ar


Starter

Practice:


Exit: Pick an element between 1-20 and make a Bohr model. Please label the protons, neutrons, and electrons.

Sep 17, 2014

Glue it in

after the

notes




{

Periodic Table Basics

1 ________

B2 ________

3 _________

4P = ____ N= ____ E=____

5

Step 1. Complete the card for each element. Complete the top section for each element by adding the element’s 1. atomic number 2. name and 3. atomic mass.

4. Determine the number of protons, neutrons, and electrons in each element.

5. Create a Bohr diagram for each element.

5

Boron

(10.81)=11

5 6 5

Application:


Step 2. Use color pencils to shade in the card for each element.

not Colored=Hydrogen Green= Li & Na Orange= B & Al Pink= O & S Red= C & Si Blue= Be & Mg Tan= N & P Purple= F & Cl Yellow= He, Ne & Ar


Step 3. Cut the cards apart and arrange according to atomic number in the pattern shown below on a large sheet of construction paper.

Step 4. After you have arranged the cards in the correct order, glue them to the paper.

1 2

3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18

Exit:Pick an element between 1-20 and make a Bohr model. Please label the protons, neutrons, and electrons.


Starter

Practice:


Exit: What does the group number tell you?

Sep 17, 2014

Glue it in

after the

notes




2930 Valence Electrons Starter Practice: Connection: Answer questions using Periodic Basics 1. What...

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