Trends in groups
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Parina Jain
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53 Slides • 14 Questions
1
Alkali metals
Lower Secondary Science
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8
Multiple Choice
Which alkali metal has the lowest melting point?
9
Multiple Choice
Which alkali metal is the most dense?
10
Multiple Choice
Which alkali metal has the highest melting point?
11
Multiple Choice
Which alkali metal is the lightest?
12
Multiple Choice
Which alkali metal is known for its explosive reaction with water?
13
Multiple Choice
Which alkali metal is the softest?
sodium
14
Multiple Choice
Which alkali metal is commonly used in rechargeable batteries?
15
Multiple Choice
Which of the following alkali metals is the most reactive?
potasium
16
Halogens
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Halogens
19
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22
Draw
Match the correct pairs
24
Multiple Choice
Which of the following elements is a noble gas?
25
Multiple Choice
Which of the following elements is a halogen?
26
Multiple Choice
Which of the following is a property of noble gases?
inert and full outer electron shells
27
Multiple Choice
As we go down the group the reactivity in Halogens ____________
28
Multiple Choice
Which of the following is a property of halogens?
They are non metals
they gain 1 electron
they are highly reactive
all of these
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Formation of Ions
Lesson - 2.3
30
Starter Activity
Can you Draw the Structure of Sodium and Fluorine
Sodium
Fluorine
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Element
Symbol
Z
K L M N
Outer
shell
electro
n
Group No
Lewis dot
Structure
Lithium
Li
3
Sodium
Na
11
Beryllium
Be
4
Boron
B
5
Magnesiu
m
Mg
12
Aluminium
Al
13
Potassium
K
19
Calcium
Ca
20
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Element
Sym
bol
Z=P
K L M N
Outer
shell
electro
n
Group No
Lewis dot
Structure
Nitrogen
N
7
Oxygen
O
8
Fluorine
F
9
Phosphorus
P
15
Sulphur
S
16
Chlorine
Cl
17
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Element
Symbol
Z
P
No. of E after
losing
Charge on
atom
Lithium
Li
3
Sodium
Na
11
Beryllium
Be
4
Boron
B
5
Magnesiu
m
Mg
12
Aluminium
Al
13
Potassium
K
19
Calcium
Ca
20
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Element
Symbol
Z=P
K L M N
No. of E
after
gaining
electrons
Charge on
the atom
Nitrogen
N
7
Oxygen
O
8
Fluorine
F
9
Phosphorus
P
15
Sulphur
S
16
Chlorine
Cl
17
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The Strong bond of attraction based on electrostatic
force between two oppositely charged cation and anions
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Try out some ionic bonding
1.
Sodium fluoride
2.
Lithium chloride
3.
Potassium oxide
4.
Sodium oxide
5.
Calcium chloride
6.
Calcium oxide
7.
Magnesium fluoride
8.
Magnesium oxide
9.
Aluminium chloride
10.
Aluminium oxide
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Phet simulation- to understand the giant ionic bonds
and formulae of ionic compounds
https://pbslm-contrib.s3.amazonaws.com/WG
BH/arct15/SimBucket/Simulations/chemthink-
ionicbonding/content/index.html
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Covalent bonding
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Covalent Bonding
https://youtu.be/NgD9yHSJ29I
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Ionic compounds dissolves in water
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Ionic compounds conduct electricity
www.youtube.com/watch?v=NfNIn4R8tg4
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Ionic compounds conduct electricity
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Giant structure of Covalent Compounds
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Structure of Graphite
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Comparative study of Diamond and Graphite
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Giant Structure of Silicon dioxide( SiO2)
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Physical Properties of Metals
1.
Most metals have high melting and boiling point.
2.
Metals are good conductor of electricity.
3.
Metals malleable and ductile in nature
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Thank you
Alkali metals
Lower Secondary Science
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