valence electrons

37 38Valence 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: Pick an element between 1-20 and make a Bohr model. Please label the protons, neutrons, and electrons.

Sep 23, 2013

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What do you think valence electrons are?

Valence ElectronsSep 23, 2013

Application: Work on Periodic Basic coloring andquestions

StarterWhat do you think valence electrons are?

Date Lecture/ Activity/ Lab Page8/28 Syllabus /Notebook Guidelines 1-28/28 Periodic Table/ Formula 3-48/28 Tools/ Measurement 5-68/28 Lab Report/ Investigations 7-88/28 Restroom passes/Homework Log 9-108/29 Safety equipment 11-128/30 Atoms Vocabulary 13-14 9/3 Atomic Theory Research notes 15-16 9/4 Observation Activity 17-18 9/5 Model Activity 19-20 9/6 Atoms Notes 21-229/9 Atomic Charges 23-249/10 APEMAN 25-269/11 Build An Atom 27-289/16 Test Corrections 29-309/18 Atomic Math and Bohr Models 31-329/19 Periodic Table Notes 33-349/20 Periodic Basics 35-369/23 Periodic Basics II 37-38

Table of Contents


Starter

Practice:



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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 #


Starter

Practice:



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{

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


Starter

Practice:



Sep 23, 2013

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


Starter

Practice:



Sep 23, 2013

Glue it in

after the

notes




valence electrons

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