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Protons, neutrons and electrons

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-PS1-1, NGSS.HS-PS1-1 · England: KS3 Chemistry: Atoms, elements and compounds, KS4 Combined Science: Atomic structure and the periodic table

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Date

Score/ 16

  1. Question 1

    Atomic structure: which statement is true?

    • A. Electrons are found in the nucleus.
    • B. Neutrons have a negative charge.
    • C. Protons and electrons have the same mass.
    • D. An atom has no overall charge because it has equal numbers of protons and electrons.

  2. Question 2

    The diagram shows an atom of nitrogen. How many protons does it have?

    −−−−−−−+++++++N

    coral + = proton · grey = neutron · purple − = electron

    Answer

  3. Question 3

    Which particle is in the nucleus with no charge?

    • A. proton
    • B. neutron
    • C. electron

  4. Question 4

    Atomic structure: which statement is true?

    • A. Atoms are mostly empty space.
    • B. Protons and electrons have the same mass.
    • C. Neutrons have a negative charge.
    • D. Electrons are found in the nucleus.

  5. Question 5

    The diagram shows an atom of helium. How many electrons does it have?

    −−++He

    coral + = proton · grey = neutron · purple − = electron

    Answer

  6. Question 6

    Which particle has no charge?

    • A. proton
    • B. neutron
    • C. electron

  7. Question 7

    Atomic structure: which statement is true?

    • A. The plum pudding model is today's accepted model of the atom.
    • B. Protons and electrons have the same mass.
    • C. The number of protons is called the atomic number.
    • D. Neutrons have a negative charge.

  8. Question 8

    The diagram shows an atom of beryllium. How many electrons does it have?

    −−−−++++Be

    coral + = proton · grey = neutron · purple − = electron

    Answer

  9. Question 9

    Which particle has a charge of +1?

    • A. proton
    • B. neutron
    • C. electron

  10. Question 10

    Atomic structure: which statement is true?

    • A. Atoms are mostly empty space.
    • B. The plum pudding model is today's accepted model of the atom.
    • C. Electrons are found in the nucleus.
    • D. Protons and electrons have the same mass.

  11. Question 11

    The diagram shows an atom of oxygen. How many electrons does it have?

    −−−−−−−−++++++++O

    coral + = proton · grey = neutron · purple − = electron

    Answer

  12. Question 12

    Which particle has no charge?

    • A. proton
    • B. neutron
    • C. electron

  13. Question 13

    Atomic structure: which statement is true?

    • A. Electrons are found in the nucleus.
    • B. Most of the mass of an atom is in the nucleus.
    • C. Protons and electrons have the same mass.
    • D. The plum pudding model is today's accepted model of the atom.

  14. Question 14

    The diagram shows an atom of boron. How many electrons does it have?

    −−−−−+++++B

    coral + = proton · grey = neutron · purple − = electron

    Answer

  15. Question 15

    Which particle is in the nucleus with no charge?

    • A. proton
    • B. neutron
    • C. electron

  16. Question 16

    Atomic structure: which statement is true?

    • A. Protons and electrons have the same mass.
    • B. The plum pudding model is today's accepted model of the atom.
    • C. Electrons are found in the nucleus.
    • D. Most of the mass of an atom is in the nucleus.

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Answer key: Protons, neutrons and electrons

  1. 1. D. An atom has no overall charge because it has equal numbers of protons and electrons.

  2. 2. 7

  3. 3. B. neutron

  4. 4. A. Atoms are mostly empty space.

  5. 5. 2

  6. 6. B. neutron

  7. 7. C. The number of protons is called the atomic number.

  8. 8. 4

  9. 9. A. proton

  10. 10. A. Atoms are mostly empty space.

  11. 11. 8

  12. 12. B. neutron

  13. 13. B. Most of the mass of an atom is in the nucleus.

  14. 14. 5

  15. 15. B. neutron

  16. 16. D. Most of the mass of an atom is in the nucleus.