Daily Practice

GCSE Science

10th April 1992

5 questions · GCSE · 584 questions in this band

1
Bonding, Structure and Properties of Matter
State one reason why simple covalent substances such as chlorine have low melting points.
2
Chemical Bonding: Ionic, Covalent and Metallic
Give the charge on an ion formed by a group 2 element.
3
Structures, Properties and Nanoparticles
Why does simple molecular carbon dioxide have a much lower melting point than giant covalent silicon dioxide?
4
Quantitative Chemistry
Calculate the number of moles in 20 g of calcium carbonate. (Mr = 100)
5
Moles, Formulae and Equations
State the value of the Avogadro constant and what it counts.

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