Group 1

Question 1

What happens to reactivity as you go down Group 1

Answer 1

Reactivity increases

Question 2

Why does reactivity increase as you go down Group 1

Answer 2

• Group 1 metals want to lose their outer electron to achieve a full outer shell.
• As you down the group the atoms are larger so have more shielding and distance from the nucleus
• Therefore less attraction to positive nucleus so e- is more easily lost

Question 3

Write the word equation for when a group 1 metal reacts with oxygen

Answer 3

metal + oxygen -> metal oxide

Question 4

What type of reaction is it when oxygen reacts with a group 1 metal

Answer 4

oxidation

Question 5

What happens when Li reacts with oxygen and what oxide is formed

Answer 5

Burns crimson/red flame to form a white solid. Lithium oxide (Li2O) is formed

Question 6

What happens when Na reacts with oxygen and what oxide is formed

Answer 6

Burns yellow flame to form a white solid. Sodium oxide (Na2O) is formed

Question 7

What happens when K reacts with oxygen and what oxide is formed

Answer 7

Burns lilac flame to form a white solid. Potassium oxide (K2O) is formed

Question 8

What happens when an oxide is dissolved into water

Answer 8

An alkaline solution is formed

Question 9

Why is the solution alkaline

Answer 9

the OH- ions

Question 10

Write the word equation for when a Group 1 metal reacts with water

Answer 10

metal + water -> metal hydroxide + hydrogen

Question 11

What happens when Lithium reacts with water and what product is formed

Answer 11

• Moves and floats on the surface
• Effervescence as gas H2
• Eventually disappears
• Lithium hydroxide + hydrogen is formed

Question 12

What happens when sodium reacts with water and what product is formed

Answer 12

• Whizzes and floats on surface
• Effervescence as gas H2
• Eventually disappears
• Melts into a ball
• Sodium hydroxide + hydrogen is formed

Question 13

What happens when Potassium reacts with water and what product is formed

Answer 13

• Whizzes and floats on surface
• Effervescence as gas H2
• Eventually disappears
• Melts into a ball
• H2 gas ignites and burns as a lilac flame
• Potassium hydroxide + hydrogen is formed

Question 14

How are group 1 metals different to typical metals:

Answer 14

• soft, can be cut by a knife
• Low density
• Low boiling and melting points

Question 15

How are group 1 metals similar to other metals

Answer 15

• Good conductors
• Shiny (when freshly cut)

Question 16

What are trends going down group 1

Answer 16

• Bigger atoms
• More reactive
• More dense
• Lower m.p and b.p
• Softer to cut