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Course: Alhussan Chemistry — Stage 9
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Alhussan Chemistry — Stage 9

Chapter 10: Structure, Bonding, and Properties

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Chapter 11: Patterns in the Periodic Table

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Chapter 12: Chemical Reactions 3 and Rates

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Chapter 13: Planet Earth and Continental Drift

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Quiz

Chemistry 11.5 More about Group 1 — Quiz

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  • Questions count: 21
  • Passing grade: B+
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1.
What forms when a Group 1 metal reacts with water?
A hydroxide solution and hydrogen
An oxide and oxygen
Carbon dioxide
A salt and water
2.
How does reactivity change down Group 1?
It decreases
It stops
It stays the same
It increases
3.
Why does reactivity increase down Group 1?
The outer electron is further from the nucleus and lost more easily
Atoms get smaller
They have more outer electrons
They are less metallic
4.
True or false? Potassium does not fit the density pattern in Group 1.
True
False
5.
True or false? Alkali metals react with chlorine to make coloured gases.
True
False
6.
True or false? Group 1 metals react with chlorine to make chlorides.
True
False
7.
2Na + 2H₂O → 2NaOH + ____
O₂
H₂O
H₂
Na₂O
8.
Lithium has density ____ g/cm³.
0.86
0.53
1.93
0.97
9.
Sodium has density ____ g/cm³.
0.53
0.86
0.97
1.53
10.
Which term matches this definition? “A property that can be measured without changing the material, such as melting point.”
Chemical property
Reactivity
Combustion
Physical property
11.
Which term matches this definition? “How readily an element reacts.”
Reactivity
Float
1+ ion
Tarnish
12.
Which is the correct definition of “Reactivity”?
Amount of matter, in g or kg.
Particles arranged as tightly as possible.
How readily an element reacts.
Data that does not fit the pattern, e.g. potassium density.
13.
Density of Group 1 metals (g/cm³). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 1
A
B
C
D
14.
Time to react with water (s). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
15.
Atomic radius of Group 1 atoms (pm). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
16.
The graph shows densities of Group 1 metals. Which statement is correct?
Dr Dabour Hub Academy - figure 4
Lithium is densest
All have the same density
Density generally increases down the group, but potassium is an exception
Density decreases down the group
17.
In the diagram of Group 1 atoms, which loses its outer electron most easily?
Dr Dabour Hub Academy - figure 5
Sodium
All equal
Potassium
Lithium
18.
In the diagram, why is potassium more reactive than lithium?
Dr Dabour Hub Academy - figure 6
Its outer electron is further from the nucleus
It has fewer protons
It has 2 outer electrons
It is smaller
19.
Which Group 1 metals float on water (density 1.0 g/cm³)? Count them from Li 0.53, Na 0.97, K 0.86, Rb 1.53, Cs 1.93.
3 metals
5 metals
4 metals
2 metals
20.
Radius rose from 152 to 248 pm. Percentage increase?
163%
63%
96%
39%
21.
Radius rose from 186 to 265 pm. Percentage increase?
30%
79%
142%
42%
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Part of Chapter 11: Patterns in the Periodic Table — see every lesson and quiz in this unit.
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