2(a) Group 1(alkali metals)

Question 1

Reactions

Answer 1

• With water
• With air/oxygen

Question 2

Reactions with water

Answer 2

Metal + Water -> Metal Hydroxide + Hydrogen

Question 3

Reactions with Air

Answer 3

Metal + Oxygen -> Metal Oxide

Question 4

Trend in Group 1

Answer 4

As you go down the group:
Reactivity increases - more shells so more shielding so electrostatic attraction decreases between nucleus and outer shell electrons so outer shell electrons are lost more easily

Melting/boiling points decrease
Density increases

Question 5

Properties of Group 1

Answer 5

• Solid at room temp.
• Shiny went cut
• Soft
• Good conductors of electricity