2A) Group 1 Metals

Question 1

What are the Alkali metals

Answer 1

Group 1 elements

Lithium
Sodium
Potassium
….

Question 2

Properties

Answer 2

• silvery coloured metals
• highly reactive
• low melting and boiling points
• soft, easily cut with a knife to expose a shiny surface that dulls on oxidation

Question 3

How is the reactivity of Group 1

Answer 3

increases down the group
lithium is least reactive
caesium most reactive

Question 4

How is density of Group 1

Answer 4

low densities (float on water). density increases down the group

Question 5

Observations of metals with air

Answer 5

Lithium: dulls with oxidation

Sodium: dulls with oxidation faster than lithium

Potassium: dulls with oxidation very quickly

Question 6

Observations of metals with water

Answer 6

Lithium: floats, fizzes, moves around

Sodium: more fizzing, might light up with yellow flame, floats, moves around faster, forms a ball

Potassium: sets fire with lilac flame, floats, moves quickly, lots of fizzing, dissolves quickly

Question 7

Equation for metal and water

Answer 7

Metal + water —> metal hydroxide + hydrogen