Unit 1: Foundation Chemistry

Test yourself on AQA AS Unit 1 Chemistry.

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1. What is the "Mass number" and what symbol is it represented by?

  • A, the number of protons and neutrons in the nucleus
  • Z, the number of protons and neutrons in the nucleus
  • Z, the number of protons in the nucleus
  • A, the number of protons in the nucleus
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2. What are the nucleons?

  • Protons and Neutrons
  • Protons and Electrons
  • Neutrons and Electrons
  • Neutrons

3. Which of the following forces hold the nucleons together?

  • Gravity
  • The strong nuclear force
  • The electrostatic force
  • The weak force

4. The general formulae for the number of electrons in each shell:

  • 2n²
  • 2n
  • n²
  • 3n

5. What are "Isotopes"?

  • Atoms with the same number of electrons with different numbers of protons
  • Atoms with the same number of protons but different numbers of neutrons
  • Atoms with the same number of protons but different numbers of electrons
  • Atoms with the same number of nucleons with different numbers of neutrons
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