4 periodic table of elements

7/25/2019 4 Periodic Table of Elements

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WAJA F4 Chemistry Chapter 4 :Periodic Table of Elements

NAME : ..

CLASS : ..

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CHAPTER 4 :PERIODIC TABLE OF ELEMENTS

A ANALYSING THE PERIODIC TABLE OF ELEMENTS

Learning OutcomesYou should be able to:

describe the contributions of scientists in the historical development of the Periodic Table

identify !roups and periods in the Periodic Table state the basic principle of arran!in! the elements in the Periodic Table from their proton numbers

relate the electron arran!ement of an element to its !roup and period

e"plain the advanta!es of !roupin! elements in the Periodic Table

predict the !roup and the period of an element based on its electron arran!ement.

Activity 1

Draw lines to match name of scientist with their contribution

Name of Scientist Contribution

Lothar Meyer First scientist to classifysubstances

Henry J. G. Moseley Classified the elements intogrou of three with similarchemical roerties

!ntoine La"oisier !rranged the #nown elementsin order of increasing atomicmass . $lements with similarroerties recurred at e"ery

eighth element.

John Newlands %lotted a grah of the atomic"olume against the atomicmass of elements

Johann &. Dobereiner Left gas in the table to befilled by undisco"eredelements

Dimitri Mendelee" 'earranging the elements inorder of increasing rotonnumber

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Activity 2

( !rrangement of elements in the %eriodic )able

a* $lements are arranged in an increasing order of ++++++++++

b* $ach "ertical column is called a ++++++..

c* $ach hori,ontal rows is called +++++++++++.

d* $lements with similar chemical roerties are laced in the same ++++++++++

e* -)he eriod number of an element* -)he number of ++++. occuied with electronsin its atom.*

/. Comlete the table below.

$lement $lectronarrangement

Number of"alenceelectrons

Grou Number ofshellsoccuied withelectrons

%eriod

H11

He42

(

Li73

/.(

B11

5/.0

C12

6/ /

N14

71 (1

O16

8

F19

9(2

Ne2010

/.3

Mg24

12

Al27

13/.3.0

Si2814

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S32

16

Cl.35

17

K39

19

Ca4020

0. !n atom of element $ has (4 neutrons. )he nucleon number of element $ is (5. 6nwhich grou and eriod is element $ located in the %eriodic )able7

!nswer8 Grou ++++++++++

%eriod ++++++++++

9. !n atom of element G has 0 shells occuied with electrons. 6t is laced in grou (2 of the %eriodic)able. &hat is the electron arrangement of atom G7

!nswer 8 $lectron arrangement of atom G +++++++

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B ANALYSING GROUP 18 ELEMENTS

Learning Outcomes: You should be able to:

list all #roup $% elements

state in !eneral the physical properties of #roup $% elements

describe the chan!es in the physical properties of #roup $% elements

describe the inert nature of elements of #roup $%

relate the inert nature of #roup $% elements to their electron arran!ements

relate the duplet and octet electron arran!ements of #roup $% elements to their stability

describe uses of #roup $% elements in daily life&&

Activity 3 :

A!"y#i$ G%&'( 18 E")*)t#

( %hysical %roerties of Grou (3 $lements

Circle the correct answerDown the Grou 8a* !tomic radius :!tomic si,e increase: decrease

b* Melting oint and ;oiling oint increase: decrease

c* Density increase: decrease

/ Comlete the figure below by gi"ing the uses of Grou (3 .

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0 !ll noble gases are ++++++++. which means chemically unreacti"e. )his is

because they ha"e +++++++++. $lectron arrangement.

$


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/. Grou ( elements react with o


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/* &hat has to haen to an atom of al#ali metal for it to achie"e a stable electronarrangement of inert gas 7

+++++++++++++++++++++++++++++++++++++

++++++++++++++++++++++++++++++++++++..0* &hat is the charge of an al#ali metal ion 7 .

++++............................................................................................+++++++

9* 'eacti"ity of al#ali metals increases from Lithium to Caesium . $


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b* Comlete this table -Data =bser"ation *!l#ali metal =bser"ation

Lithium

Sodium

%otassium

/* )he 'eaction of al#ali metals &ith =


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f* ;ased on your results@ arrange the al#ali metals in ascending order ofreacti"ity.

++++++++++++++++++++++++++++++++

D ANALYSING GROUP 1- ELEMENTS

Learning Outcomes You should be able to:

list all #roup $( elements

state the !eneral physical properties of chlorine bromine and iodine

describe chan!es in the physical properties from chlorine to iodine

list the chemical properties of chlorine bromine and iodine

describe the similarities in chemical properties of chlorine bromine and iodine

describe chan!es in reactivity of #roup $( elements do'n the !roup

predict physical and chemical properties of other elements in #roup $(&

Activity -

(* State the uses of Chlorine and iodine

a* Chlorine E +++++++++++++++++++++++++++++.

b* 6odine E ++++++++++++++++++++++++++++++..

/ -a* Gi"e the hysical state of halogens below at room temerature 8

i* Fluorine8 +++++++++++++++++

ii* Chlorine8 +++++++++++++++++

iii* ;romine8 +++++++++++++++++.

i"* 6odine 8 ++++++++++++++++.

-b* Fill in the blan#s below.

2Cl melting and colour of Density

2Br boiling oints halogens +++.

2I +++.. becomes

++++.

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0* &hen going down the Grou (2@ the melting and boiling oints increase. $ HOCl

hydrochloric hyochlorus acid acid

&rite a balanced e?uation when bromine reacts with water.

++++++++++++++++++++++++++++++++..

b*. 6n gaseous state they react with hot iron to form a brown solid@ iron -666* halides.$

23Br 32FeBr

&rite a balanced e?uation when iodine "aour reacts with iron

+++++++++++++++++++++++++++++++++c*. Grou (2 elements react t with sodium hydro NaOI > OH2

&rite a balanced e?uation when chlorine reacts with sodium hydro


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Activity 8

)o in"estigate the Chemical roerties of Grou (2 elements.

)he 'eaction of halogens with iron -refer ractical boo# g 99*

(* Data and =bser"ation -Comlete the following table*

Halogen'eactant

=bser"ation

Chlorine ;romine 6odine

&ater

6ron wool

Sodium hydro


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E ANALYSING ELEMENTS IN A PERIOD


list all elements in Period )

'rite electron arran!ements of all elements in Period )

describe chan!es in the properties of elements across Period )

state chan!es in the properties of the o"ides of elements across Period )

predict chan!es in the properties of elements across Period *

Activity .%eriod 0 in the %eriodic )able E %roerties of $lements

(* Comlete the table and answer the ?uestion gi"en below

$lement Na Mg !l Si % S Cl !r

%roton number (( (/ (0 (9 (1 ( (2 (3

$lectronarrangement

Number of "alenceelectrons

!tomic radius -m* (3 (4 (90 ((3 ((4 (49 (44 59

%hysical state atroom temerature

Solid Solid Solid Solid Solid Solid Gas Gas

$lectronegati"ity 4.5 (./ (.1 (.3 /.( /.1 0.4

/* Fill in the blan#s with the correct answer.

a*. )he roton number +++++++++.. by one unit from one element to the ne


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Activity 1/

(* ;elow are some o


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F TRANSITION ELEMENTS


identify the positions of transition elements in the Periodic Table

!ive e"amples of transition elements

describe properties of transition elements

state uses of transition elements in industries.

Activity 11

( -a* )ranstition elements are elements from Grou ++++++. to Grou ++++++.

-b* State 0 e


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9 )ransition elements form coloured ions or comoundComlete the table below

6on of transition element Formula of the ion Colour of a?ueous solution

Cooer -66* ion

6ron -66* ion Fe

/>

6ron -666* ion

ellowish ;rown

Chromium -666* ion

Chromate -6* ion

Dichromate -6* ion

Manganese -66* ion

Manganate -6* ion

9 )ransition elements form ions with different =


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reresent the actual symbol of the element

Diagram (

sing the letters in the %eriodic )able of the $lements in Diagram (@ answer the following?uestions.

-a* -i* State the osition of element $ in the %eriodic )able.

++++++++++++++++++++++++++++++++..

-ii* Choose the element which e


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W + Y ,

-a* State three subatomic articles in an atom..+++.............++++++++++++++++++++...............+++...+

-b* -i* &hat is the meaning of the OeriodP in the %eriodic )able of element7

.......................................................................................................................

.....................................................................................................................

-ii* State the eriod of element & in the %eriodic )able of element. $

4 periodic table of elements

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