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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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Score/ 16

  1. Question 1

    Atomic structure: which statement is true?

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

  2. Question 2

    Which particle has a charge of −1?

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

  3. Question 3

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

    −−−+++Li

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

    Answer

  4. Question 4

    Atomic structure: which statement is true?

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

  5. Question 5

    Which particle has no charge?

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

  6. Question 6

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

    −−−−−−−−++++++++O

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

    Answer

  7. Question 7

    Atomic structure: which statement is true?

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

  8. Question 8

    Which particle is in the nucleus and its number defines the element?

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

  9. Question 9

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

    −−−−−−−−++++++++O

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

    Answer

  10. Question 10

    Atomic structure: which statement is true?

    • A. Neutrons have a negative charge.
    • B. The plum pudding model is today's accepted model of the atom.
    • C. An atom has no overall charge because it has equal numbers of protons and electrons.
    • D. Protons and electrons have the same mass.

  11. Question 11

    Which particle has no charge?

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

  12. Question 12

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

    −−−−−−−+++++++N

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

    Answer

  13. Question 13

    Atomic structure: which statement is true?

    • A. The plum pudding model is today's accepted model of the atom.
    • B. An atom has no overall charge because it has equal numbers of protons and electrons.
    • C. Neutrons have a negative charge.
    • D. Electrons are found in the nucleus.

  14. Question 14

    Which particle has a very tiny mass (about 1/1840 of a proton)?

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

  15. Question 15

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

    −−−−−−−−−+++++++++F

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

    Answer

  16. Question 16

    Atomic structure: which statement is true?

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

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  1. The number of protons is called the atomic number.
  2. electron
  3. 3
  4. Most of the mass of an atom is in the nucleus.
  5. neutron
  6. 8
  7. An atom has no overall charge because it has equal numbers of protons and electrons.
  8. proton
  9. 8
  10. An atom has no overall charge because it has equal numbers of protons and electrons.
  11. neutron
  12. 7
  13. An atom has no overall charge because it has equal numbers of protons and electrons.
  14. electron
  15. 9
  16. Most of the mass of an atom is in the nucleus.