Reactivity of the Metals TEST

1. What name is given to the elements in Group 1?

• The alkali metals

• The halogens

• The noble gases

2. Why must the elements in Group 1 be stored under oil?

• They are poisonous

• They are very valuable

• They react quickly with oxygen in

  the air

3. What is produced when sodium reacts with water?

• Sodium oxide

• Sodium hydroxide and hydrogen

• Sodium chloride

4. What would you expect to see when a piece of potassium is placed into a large bowl

of water?

• Floats, fizzes, moves around quickly, sparks

• Sinks, no reaction

• Floats, moves around slowly

5. How can you tell that the solution left after a Group 1 element has reacted with water

is alkaline?

• Turns limewater cloudy

• Turns universal indicator purple

• Turns methyl

  orange red

6. Which half equation shows the process of a potassium atom losing an electron?

• 
• 
• 

7. Why is sodium more reactive than lithium?

• The outer electron is closer to the nucleus, so it is lost more easily

• The outer electron is further from the nucleus, so it is harder to lose

• The outer electron is further from the nucleus, so it is lost more easily

8. What are the products of the equation in the picture?

• 
• 
• 

9. What colour flame is seen when potassium reacts with water?

• red

• orange

• purple

10. What hazard symbol might you see on sodium hydroxide or potassium hydroxide?

• Corrosive

• Flammable

• Oxidising agent