CAIE IGCSE Chemistry 8.2.1 Group I Alkali Metals Lithium Sodium Questions

Work through real CAIE IGCSE Chemistry questions to compare alkali metals and explain their reactions, physical properties and safe storage.

Exam points

recall physical properties of Group I alkali metals
describe the increase in Group I reactivity down the group
describe reactions of Group I metals with water and the products formed
compare Group I metals using density, melting point, softness and storage under oil

[Maximum number: 1]

Lithium and potassium are metals in Group I of the Periodic Table.
Lithium has a melting point of $181^{\circ} \mathrm{C}$ and a density of $0.53 \mathrm{~g} / \mathrm{cm}^{3}$ .
Which row describes the melting point and density of potassium?

melting point in ${ }^{\circ} \mathrm{C}$

density in $\mathrm{g} / \mathrm{cm}^{3}$

less than 181

less than 0.53

less than 181

greater than 0.53

greater than 181

less than 0.53

greater than 181

greater than 0.53

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CAIE IGCSE Chemistry 8.2.1 Group I Alkali Metals Lithium Sodium Questions question 1