Year 10 CHEMISTRY
UNIT 9 THE PERIODIC TABLE
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Year 10 CHEMISTRY
UNIT 9 THE PERIODIC TABLE
9.1 & 9.2 THE PERIODIC TABLE & PERIODIC TRENDS
LEARNING BEFORE LESSON (LBL): THE PERIODIC TABLE & PERIODIC TRENDS
Click and watch this
video
to learn about “How Does The Periodic Table Work”.
PLENARY: Answer all the following questions
Question
Answer
1. Elements in the Periodic Table are arranged in order of
their …………………. .
2. Columns in the Periodic Table are known as ………… .
3. Rows in the Periodic Table are known as ………… .
4. Metals are located on ………… side of the Periodic Table while
non-metals are found on the ………. side of the Periodic Table.
5. Elements that show a combination of metallic and non-metallic
properties are known as ……………… .
6. Group I metals are also known as …………….. .
7. Group II metals are also known as ……………. .
8. Group VII elements are also known as ……………. .
9. Group VIII elements are also known as ……………. .
10. Moving across a period, all elements have the same number
of …………… but the number of …………. increases.
11. Group number of elements in the Periodic Table is the same as the
number of ………………… .
12. Moving across a period, metallic character decreases or increases?
13. Elements in the same group have similar …………….. Properties. What is the missing word?
What is the reason for this?
14. Explain why moving down a group, atomic size increases.
9.3 GROUPS PROPERTIES
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Year 10 CHEMISTRY
UNIT 9 THE PERIODIC TABLE
LEARNING BEFORE LESSON (LBL): GROUP I - THE ALKALI METALS
Click and watch this
video
to learn about the alkali metals.
Note: Group I metals (alkali metals):
Starter: Physical properties
1) Based on what you have learnt in the video, complete the following table:
Metal
(symbol)
Electronic
structure
Density/
gcm-3
Melting
point/ °C
Boiling
point/ °C
Lithium
0.53
181
1324
Sodium
0.97
98
883
Potassium
0.86
63
760
Hardness
Flame test
(colour)
2) Based on the table above, describe the trend down Group I:
Density
Melting, boiling point
Hardness
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Year 10 CHEMISTRY
UNIT 9 THE PERIODIC TABLE
Chemical properties:
Observation when alkali metals react with water.
1) Choose phrases from slide 27 and fill in the white part of the table.
2) Predict how the reaction would be like for other alkali metals by filling in the grey part of the table
Metal
(symbol)
Sound
Size change of
sample
Motion
State?
Flame?
Lithium
Sodium
Potassium
Rubidium
Caesium
3) Write an equation for the reaction between alkali metals and water.
Metal
Equation
Lithium
Sodium
Potassium
4) What is the colour change you would observe when you put a few drops of Universal Indicator into the
solution after the reaction?
5) How do we test and identify the gas produced in the reactions between alkali metals with water?
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Year 10 CHEMISTRY
UNIT 9 THE PERIODIC TABLE
LEARNING BEFORE LESSON (LBL): GROUP VII - THE HALOGENS
Click and watch this
video
to learn about the halogens.
Note: Group VII elements (halogens):
Starter: Physical properties
1) Based on what you have learnt in the video, fill up the white boxes of the table with the right
electronic structure, physical states and colour for the elements in Group VII.
2) Based on the trend down the group, predict the melting points and boiling points of fluorine and
astatine.
Halogen
(symbol)
Electronic
structure
Melting
point/ °C
Boiling
point/ °C
-101
-35
2,8,18,7
-7
59
2,8,18,18,7
114
184
State at r.t.p.
Colour
Fluorine
Chlorine
Bromine
Iodine
Astatine
2,8,18,32,18,7
3) Based on the table above, describe the trend down the group:
Melting, boiling point
State at r.t.p.
Colour
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Year 10 CHEMISTRY
UNIT 9 THE PERIODIC TABLE
Chemical properties:
1) Reaction of chlorine gas with alkali metals
Write an equation for the reaction between each metal and chlorine
Metals
Observation
Equation
Lithium
Burns with bright flame; white solid
produced
Sodium
Burns with bright flame; white solid
produced; Reaction is more vigorous
than lithium
Potassium
Burns with bright flame; white solid
produced; Reaction is more vigorous
than sodium
2) Reaction of halogens with halide ions
By referring to slide 46 (unit 9 The Periodic Table slide), complete the table with observation (colour
change), equations & ionic equations involved.
Halogens
Halide
Potassium chloride
Potassium bromide
Potassium iodide
Chlorine
Bromine
Iodine
Conclusion: Reactivity …………………........... down the group
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Year 10 CHEMISTRY
UNIT 9 THE PERIODIC TABLE
9.5 THE NOBLE GASES
LEARNING BEFORE LESSON (LBL): GROUP VIII - THE NOBLE GASES
Click and watch this
video
to learn about the noble gases.
Note: Group VIII elements (Noble gases)
Physical properties:
1) Describe their trends moving down the group.
Atomic size
Density
Melting, boiling point
chemical properties:
2) Why are noble gases exist as monoatomic structure and unreactive?
Uses of the noble gases:
Noble gases
Uses
Helium
Neon
Argon
Krypton
Xenon
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Year 10 CHEMISTRY
UNIT 9 THE PERIODIC TABLE
9.4 TRANSITION ELEMENTS
LEARNING BEFORE LESSON (LBL): GROUP VIII - THE TRANSITION ELEMENTS
Click and watch this
video
to learn about the “transition metals and their properties”.
Note: Transition Elements
Physical properties:
Similarities compared to G I, II, III metals
Differences compared to G I, II, III metals
Chemical properties:
Properties
Examples
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