CAIE IGCSE Chemistry Lithium Sodium and Potassium Trends

Practise comparing lithium, sodium and potassium and applying down-group trends in softness, density, melting point and water reactivity.

Exam points

describe lithium, sodium and potassium as soft metals stored under oil to exclude air and water
apply decreasing melting point and generally increasing density down Group I
order reactivity as increasing down the group and compare vigour with cold water

[Maximum number: 1]

Some elements are shown in the order they appear in the reactivity series. The most reactive element is at the top.
> sodium calcium magnesium aluminium zinc iron hydrogen copper

Answer the questions using the list of elements. Each element may be used once, more than once or not at all.

Identify:

a metal which is stored under oil

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8.2.1—Group I alkali metals, lithium, sodium question 1