Unit 1: Foundation Chemistry

Test yourself on AQA AS Unit 1 Chemistry.

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

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

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

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

4. What is the relative mass of an electron?

  • -1
  • 1/1840
  • 0
  • 1

5. What is the "Atomic number" and what symbol is it represented by?

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

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