byMr. Gunzelle

THE PERIODIC TABLE

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HOMEPAGELESSON OBJECTIVES

PERIODIC TABLE

PERIOD

GROUP

QUIZZES

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LESSON OBJECTIVES:

By the end of the lesson you should be able to:• describe the arrangement of elements in the

periodic table• outline at least TWO trends across a period• outline at least TWO trends down a group

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INSTRUCTION: Click on the link below, watch the video, then state what you think the video is about

LINK : http://www.youtube.com/watch?v=s_AIE-mZBWk

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SO, WHAT IS THE VIDEO ABOUT?

Ready to know if you are right? Click here to find out

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• Girls go to a library trying to find a Harry Potter book• They had problems initially because the books were arranged according to numbers they did not understand

Why is it important to arrange things?

Have the answer? CLICK HERE TO FIND OUT

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ANSWER:

1. So that they are easier to find,

2. and because the arrangement of items gives information

about them

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WHAT IS THE MOST ORGANISED WAY TO ARRANGE THE FOLLOWING?

INSTRUCTION:This activity is to be done in pairs. Explain how you have arranged the items. Now, CLICK HERE TO VIEW ACTIVITY

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Homepage Click here after performing activity to move on

I 3

F 5H 11

D 10

A 1

B 4

C 7

L 12

E 2J 6

G 8

K 9

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I 3

F 5 H 11

D 10A 1 B 4 C 7

L 12

E 2

J 6

G 8

K 9

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I) ROWS are alphabetically arrangedII) COLUMNS are numerically arranged

How are the 20 elements that you know arranged?

INSTRUCTION:

CLICK HERE TO VIEW THE ELEMENTS. Examine their arrangement then state the order in which they are arranged

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ROWSIn the periodic table, elements are arranged into rows called periods. Across a period:

• elements are arranged in order of increasing atomic number • each element differs from its previous by one proton and one electron• the number of shells that the elements have is the same • the elements become more non-metallic, moving to the right

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In the periodic table, elements are arranged according to their atomic numbers in:

1.Rows (click on ‘rows’ to see how elements are arranged in them)

2.Columns (click on ‘columns’ to see how elements are arranged in them)

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SOME ELEMENTS IN THE SECOND ROW

INSTRUCTION: examine the following elements in the second row. Do you notice any PATTERN among them?

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SOME ELEMENTS IN THE SECOND COLUMN

INSTRUCTION: examine the following elements in the second column. Do you notice any PATTERN among them?

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COLUMNSIn the periodic table, elements are arranged into columns called groups. Down a group:

• elements are arranged in order of increasing atomic number • each element has one shell more than the previous element• all the elements have the same number of electrons on the outer shell • the elements become more metallic, as the group is descended.

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POINTS TO NOTE ABOUT GROUPS AND PERIODS

• There are 8 groups in the periodic table and 7 periods•The group number indicates the number of electrons that each element in the group has on its outer shell • The period number indicates the number of shells that the elements have.

LET ME SEE HOW MUCH I HAVE LEARNT

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http://www.juliantrubin.com/quiz/periodictablequiz.html

ASSESSMENT

Click on the following links below, then answer the questions which follow.

Link 1:

Link 2: Multiple choice questions

ASSESSMENT

1. The reason for resemblance among elements of a given group in the periodic table is the

A) similarity in the valence (outer) shell of the atoms

B) similarity in their nuclear structure

C) fact that they all have the same number of protons

D) fact that they all have the same number of neutrons

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2. In the periodic table, metallic characteristics decrease from

PERIOD GROUP

A) right to leftbottom to top

B) right to lefttop to bottom

C) left to right bottom to top

D) left to right top to bottom

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3. An element with atomic number 11 is likely to have similar chemical properties to the element whose atomic number is

A) 9

B) 7

C) 3

D) 2

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4. In the table below, the atomic numbers for elements W, X, Y and Z are CORRECT. The group numbers and periods MAY or MAY NOT be correct.

Element Atomic number

Group number

Period

W 10 VII II

X 17 VII III

Y 11 II IV

Z 18 VIII II

The element that is correctly linked to its group number and period is

A) WB) XC) YD) Z

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Congratulations

You are correct!!!!Move on to question 2 Move on to question 3 Move on to question 4 QUIT

I’M REALLY, REALLY SORRY

BUT, YOU ARE GOING TO HAVE TO TRY AGAIN .

Back to question 1 Back to question 3Back to question 2 Back to question 4

THE END!!!!

CLICK HERE TO VIEW LIST OF REFERENCES

References

Mahase, C., Morris, M. (1998). CXC revision for chemistry. United Kingdom: CambridgeUniversity Press

Rubin, J. (2003). The periodic table quiz. Retrieved October 1, 2010, from http://www.juliantrubin.com/quiz/periodictablequiz.html

Tindale, A. (1992). A concise course for cxc. England: Stanley Thornes Ltd

Youtube. (n.d). Looking for a book in the library. Retrieved October 1, 2010, fromhttp://www.youtube.com/watch?v=s_AIE-mZBWk

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