Unit 1: Foundation Chemistry

Test yourself on AQA AS Unit 1 Chemistry.

1. Where are electrons located?

  • ...
  • Inside the nucleus
  • Surrounding the nucleus
  • Outside the atom
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2. What are "Isotopes"?

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

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

  • 3n
  • 2n²
  • 2n

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

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

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

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