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Pertanyaan 1
Pilihan ganda
Which element is the first in the group of alkali metals on the periodic table?
- Lithium
- Sodium
- Potassium
- Rubidium
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Alkali Metal
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Pertanyaan 2
Pilihan ganda
What is a common physical property of alkali metals?
- They are hard and brittle
- They are shiny and soft
- They are non-conductive
- They are very dense
Pertanyaan 3
Pilihan ganda
How should alkali metals be stored?
- In water
- In oil
- In open air
- In a freezer
Pertanyaan 4
Pilihan ganda
What happens when alkali metals react with water?
- They dissolve slowly
- They sink to the bottom
- They create a vigorous reaction
- They remain unchanged
Pertanyaan 5
Pilihan ganda
Which gas is produced when alkali metals react with water?
- Oxygen
- Carbon Dioxide
- Hydrogen
- Nitrogen
Pertanyaan 6
Pilihan ganda
How do alkali metals react with air?
- They rust
- They form oxides
- They become cold
- They evaporate
Pertanyaan 7
Pilihan ganda
Which alkali metal is the most reactive?
- Lithium
- Sodium
- Potassium
- Francium
Pertanyaan 8
Pilihan ganda
What is a common compound formed by sodium?
- Sodium chloride
- Sodium sulfate
- Sodium carbonate
- Sodium citrate
Pertanyaan 9
Pilihan ganda
Which method helps predict the properties of francium?
- Studying trends in the periodic table
- Observing francium directly
- Testing with litmus paper
- Weighing francium
Pertanyaan 10
Pilihan ganda
As you move down the group of alkali metals in the periodic table, what happens to their reactivity?
- It decreases
- It stays the same
- It increases
- It varies randomly
Pertanyaan 11
Pilihan ganda
Which of the following elements is an alkali metal?
- Helium
- Lithium
- Boron
- Carbon
Pertanyaan 12
Pilihan ganda
What is a common physical property of alkali metals?
- High density
- Brittle
- Soft and shiny
- Non-conductive
Pertanyaan 13
Pilihan ganda
How should alkali metals be stored to prevent reactions?
- In water
- In air
- Under oil
- In a plastic bag
Pertanyaan 14
Pilihan ganda
What happens when an alkali metal reacts with water?
- Forms a precipitate
- Releases hydrogen gas
- Becomes solid
- Changes color
Pertanyaan 15
Pilihan ganda
Which alkali metal is the most reactive?
- Lithium
- Sodium
- Potassium
- Francium
Pertanyaan 16
Pilihan ganda
What is a common reaction of alkali metals with air?
- Formation of oxides
- Formation of salts
- Formation of acids
- Formation of bases
Pertanyaan 17
Pilihan ganda
Which compound is commonly formed by alkali metals?
- Carbonates
- Chlorides
- Phosphates
- Nitrates
Pertanyaan 18
Pilihan ganda
How does the reactivity of alkali metals change down the group?
- Increases
- Decreases
- Remains the same
- Varies randomly
Pertanyaan 19
Pilihan ganda
Which method is used to predict the properties of francium?
- Laboratory experiments
- Theoretical calculations
- Direct observation
- Historical data
Pertanyaan 20
Pilihan ganda
What is the primary reason for the high reactivity of alkali metals?
- Single valence electron
- High melting point
- Strong metallic bonding
- Dense atomic structure
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