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?

  • Z, the number of protons and neutrons in the nucleus
  • A, the number of protons and neutrons in the nucleus
  • A, the number of protons in the nucleus
  • Z, the number of protons in the nucleus
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2. What is the "Atomic number" and what symbol is it represented by?

  • Z, the number of protons in the nucleus
  • A, the number of protons and neutrons in the nucleus
  • A, the number of protons in the nucleus
  • Z, the number of protons and neutrons in the nucleus

3. What are "Isotopes"?

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

4. Where are electrons located?

  • ...
  • Inside the nucleus
  • Surrounding the nucleus
  • Outside the atom

5. What are the nucleons?

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