Daily Practice

GCSE Science

20th March 1993

5 questions · GCSE · 584 questions in this band

1
Atomic Structure and the History of the Atom
An atom has an atomic number of 17 and a mass number of 37. How many neutrons does it have?
2
The Periodic Table: Groups and Trends
Give two observations when lithium is added to water.
3
Bonding, 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.
4
Chemical Bonding: Ionic, Covalent and Metallic
Give the charge on an ion formed by a group 2 element.
5
Structures, Properties and Nanoparticles
Why does simple molecular carbon dioxide have a much lower melting point than giant covalent silicon dioxide?

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