Daily Practice

GCSE Science

26th September 1991

5 questions · GCSE · 584 questions in this band

1
The Periodic Table: Groups and Trends
State the trend in reactivity down group 7 and name the most reactive halogen listed on the periodic table.
2
Bonding, Structure and Properties of Matter
State one reason why simple covalent substances such as chlorine have low melting points.
3
Chemical Bonding: Ionic, Covalent and Metallic
Define a covalent bond.
4
Structures, Properties and Nanoparticles
Explain why graphite conducts electricity but diamond does not.
5
Quantitative Chemistry
Calculate the Mr of calcium carbonate, CaCO3. (Ca = 40, C = 12, O = 16)

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