2. THE STRUCTURE OF MATTER (YOUTUBE VERSION)

Question 1

1. How many Alkali Metals are there?

Answer 1

• 6

Question 2

2. Name the 6 Alkali Metals.

Answer 2

• Lithium
• Potassium
• Sodium
• Rubidium
• Caesium
• Francium

Question 3

3. What happens to Alkali Metals when they are exposed to the air?

Answer 3

• they quickly become coated with compounds that form on the metal’s surface

Question 4

4. What happens when you slice through Lithium?

Answer 4

• you can see the metallic luster
• a black coating then quickly reappears

Question 5

5. Are Alkali metals soft metals or hard metals?

Answer 5

• they are soft metals
• they can be cut with a knife

Question 6

6. What liquid is Sodium kept under to prevent it from reacting with air?

Answer 6

• Oil

Question 7

7. What chemical reaction causes the freshly cut metal surface to form a layer of coating on it that replicates the appearance of the original metal surface?

Answer 7

• Corrosion

Question 8

8. What happens to the elements chemically as we go down the group?

Answer 8

• the elements react more quickly with the air

Question 9

9. What elements are reacting in this chemical reaction?

Answer 9

• sodium
• water

Question 10

10. What are the products of this reaction?

Answer 10

• hydrogen gas
• the sodium metal dissolves to give an aqueous cation with a single positive charge