Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1The Periodic Table: Groups and Trends
Give two observations when lithium is added to water.
- 2Bonding, Structure and Properties of Matter
A student says that metals conduct electricity because they contain free-moving ions. Explain why this statement is incorrect, and give the correct explanation.
- 3Chemical Bonding: Ionic, Covalent and Metallic
Give the charge on an ion formed by a group 2 element.
- 4Structures, Properties and Nanoparticles
Why does simple molecular carbon dioxide have a much lower melting point than giant covalent silicon dioxide?
- 5Quantitative Chemistry
Calculate the number of moles in 20 g of calcium carbonate. (Mr = 100)
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