6.4.1.1 The structure of an atom Quiz: AQA Combined Science, Unit 21

The 20 questions

1. What is the approximate radius of a typical atom?

   • 1 x 10^-15 m
   • 1 x 10^-5 m
   • 1 x 10^-8 m
   • 1 x 10^-10 m

2. What is the approximate radius of an atom?

   • About 1 x 10^-15 m
   • About 1 x 10^-8 m
   • About 1 x 10^-5 m
   • About 1 x 10^-10 m

3. Which particles make up the nucleus of an atom?

   • Only protons
   • Neutrons and electrons
   • Protons and neutrons
   • Electrons and protons

4. Which particle in an atom has no electric charge and sits in the nucleus?

   • Proton
   • Neutron
   • Electron
   • Alpha particle

5. What is the overall charge of the nucleus?

   • Variable
   • Negative
   • Positive
   • Neutral

6. Where is almost all the mass of an atom concentrated?

   • Nucleus
   • Outer edge
   • Electron shell
   • Energy levels

7. What are the different distances of electrons from the nucleus called?

   • Energy levels
   • Atomic orbitals
   • Mass numbers
   • Isotopes

8. Where does an electron move when it absorbs electromagnetic radiation?

   • Outside the atom
   • Higher energy level
   • Lower energy level
   • Inside the nucleus

9. Where does an electron move when it emits electromagnetic radiation?

   • Higher energy level
   • Lower energy level
   • Outer orbit
   • Into the nucleus

10. Roughly what fraction of an atom's radius is the radius of its nucleus?

    • About 1/10
    • About 1/100
    • Equal to 1/2
    • Less than 1/10 000

11. Why does a neutral atom have no overall electrical charge?

    • More electrons than protons
    • Equal protons and neutrons
    • Equal protons and electrons
    • No charged particles

12. A neutral atom has 6 protons. How many electrons does it have?

    • 12
    • 0
    • 6
    • 3

13. An atom has 6 protons and 6 neutrons. What is its mass number?

    • 18
    • 12
    • 6
    • 0

14. A radius of 1 x 10^-10 m written in standard form is equal to which value in metres?

    • 10 000 000 000 m
    • 0.00000000001 m
    • 0.0000000001 m
    • 0.000000001 m

15. What is the approximate radius of a typical atom in metres?

    • 1 × 10⁻²⁰ m
    • 1 × 10⁻¹⁵ m
    • 1 × 10⁻¹⁰ m
    • 1 × 10⁻⁵ m

16. What is the mass number of a nucleus with 6 protons and 7 neutrons?

    • 1
    • 6
    • 7
    • 13

17. A nucleus has a charge of +4 units. Using the idea of protons, how many protons does it contain?

    • 0
    • 8
    • 2
    • 4

18. Which two subatomic particles have equal and opposite charges?

    • Protons and neutrons
    • Electrons and neutrons
    • Protons and electrons
    • Nucleons and electrons

19. Written as a decimal, 2 x 10^-9 m is which value?

    • 2000000000 m
    • 0.000000002 m
    • 0.00000002 m
    • 0.0000000002 m

20. What term defines atoms of the same element with different neutron numbers?

    • Isotopes
    • Isomers
    • Isobars
    • Ions

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