C1 Atoms (Part 5)

Question 1

Compare group 1 metals with transition metals

Answer 1

Both metals

• Heat and electricity conductor
• Shiny when polished
• Form ionic compounds with non metals

Transition metals

• Higher densities and melting points than group 1
• Less reactive and harder than group 1

Question 2

State three common characteristics of transition metals

Answer 2

• Ions with different charges
• Coloured compounds
• Catalytic properties

Question 3

What is a catalyst?

Answer 3

A catalyst is a chemical substance that increases the rate of a
chemical reaction.
It is not used up over the course of the reaction.

Question 4

State the colours of flames observed when lithium, sodium, and potassium burn in oxygen

Answer 4

Lithium –> Crimson Red
Sodium –> Yellow-orange
Potassium –> Lilac

Question 5

Describe the properties of noble gases.

Discuss the trend in boiling point down the group.

Answer 5

Noble gases

• Non-metals
• gases
• Low boiling points
• Unreactive (full outer shell; they don’t easily accept or lose electrons).

The boiling point increases down the group, as the atoms get heavier.