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Group 1

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-PS1-1, NGSS.HS-PS1-1 · England: KS3 Chemistry: The periodic table, GCSE Combined Science: Atomic structure and the periodic table

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Question 1
Complete the word equation: sodium + water → sodium hydroxide + ?
Answer
2
Question 2
The alkali metals: which statement is NOT true?
- A. Sodium is less dense than water, so it floats.
- B. Group 1 metals are soft enough to cut with a knife.
- C. Group 1 metals have two outer electrons.
- D. Alkali metals form ions with a 1+ charge.
3
Question 3
Why does reactivity increase down group 1?
- A. The atoms have more outer electrons
- B. The atoms get smaller
- C. The nucleus loses protons
- D. The outer electron is further from the nucleus, so it is lost more easily
Question 4
Complete the word equation: sodium + water → sodium hydroxide + ?
Answer
5
Question 5
The alkali metals: which statement is NOT true?
- A. Sodium is less dense than water, so it floats.
- B. Alkali metals form ions with a 1+ charge.
- C. Alkali metals are found pure in nature.
- D. Group 1 metals are soft enough to cut with a knife.
6
Question 6
Why are alkali metals stored under oil?
- A. because they are liquids
- B. to make them shiny
- C. to stop them reacting with oxygen and water vapour in the air
- D. to keep them warm
Question 7
Complete the word equation: potassium + water → ? + hydrogen
Answer
8
Question 8
The alkali metals: which statement is NOT true?
- A. Alkali metals react with water to make alkaline solutions.
- B. Group 1 metals are soft enough to cut with a knife.
- C. Alkali metals form ions with a 1+ charge.
- D. Alkali metals are found pure in nature.
9
Question 9
Lithium fizzes gently in water, sodium melts into a ball and whizzes around, and potassium bursts into a lilac flame. What does this show?
- A. Reactivity increases down group 1
- B. Reactivity decreases down group 1
- C. All group 1 metals react the same
- D. Potassium is not in group 1
Question 10
Complete the word equation: sodium + water → ? + hydrogen
Answer
11
Question 11
The alkali metals: which statement is NOT true?
- A. Sodium is less dense than water, so it floats.
- B. Group 1 metals have two outer electrons.
- C. Alkali metals react with water to make alkaline solutions.
- D. Group 1 metals are soft enough to cut with a knife.
12
Question 12
Melting points: lithium 181 °C, sodium 98 °C, potassium 63 °C, rubidium 39 °C. Which is the best prediction for caesium?
- A. about 75 °C
- B. about 200 °C
- C. about 29 °C
- D. about 300 °C
Question 13
Complete the word equation: potassium + water → potassium hydroxide + ?
Answer
14
Question 14
The alkali metals: which statement is NOT true?
- A. Alkali metals react with water to make alkaline solutions.
- B. Group 1 metals are soft enough to cut with a knife.
- C. Alkali metals are found pure in nature.
- D. Sodium is less dense than water, so it floats.
15
Question 15
Melting points: lithium 181 °C, sodium 98 °C, potassium 63 °C, rubidium 39 °C. Which is the best prediction for caesium?
- A. about 75 °C
- B. about 200 °C
- C. about 29 °C
- D. about 300 °C
Question 16
Complete the word equation: lithium + water → lithium hydroxide + ?
Answer

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Answer key: Group 1

1. hydrogen
2. C. Group 1 metals have two outer electrons.
3. D. The outer electron is further from the nucleus, so it is lost more easily
4. hydrogen
5. C. Alkali metals are found pure in nature.
6. C. to stop them reacting with oxygen and water vapour in the air
7. potassium hydroxide
8. D. Alkali metals are found pure in nature.
9. A. Reactivity increases down group 1
10. sodium hydroxide
11. B. Group 1 metals have two outer electrons.
12. C. about 29 °C
13. hydrogen
14. C. Alkali metals are found pure in nature.
15. C. about 29 °C
16. hydrogen