Atom Structure And Isotopes: Quiz!

24 Questions | Total Attempts: 69

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Atom Structure And Isotopes: Quiz!

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Questions and Answers
  • 1. 
    In a neutral atom, the numbers of protons and electrons are _____.
    • A. 

      Not the same

    • B. 

      The same

  • 2. 
     The charge on an atom is _____.
    • A. 

      Neutral

    • B. 

      Negative

    • C. 

      Positive

  • 3. 
    A neutral atom has 40 electrons and 46 neutrons. How many protons does it have?
    • A. 

      40

    • B. 

      46

    • C. 

      86

  • 4. 
    A neutral atom has 22 electrons and 24 neutrons.  What is its atomic number?
    • A. 

      22

    • B. 

      24

    • C. 

      45

  • 5. 
    The atom's mass is found mostly in the atom's  _____.
    • A. 

      Nucleus

    • B. 

      Protons

    • C. 

      Electrons

    • D. 

      Electron cloud

  • 6. 
    A particle has 25 protons, 22 electrons and 24 neutrons.  Which of these statements is true? 
    • A. 

      The particle is an ion.

    • B. 

      The particle is a neutral atom.

  • 7. 
    What is the atomic number of an atom that has 12 protons, 13 neutrons, and 12 electrons?
    • A. 

      12

    • B. 

      2

    • C. 

      13

    • D. 

      25

  • 8. 
    Two isotopes of the same element have the same number of  _____.
    • A. 

      Protons

    • B. 

      Neutrons

    • C. 

      Electrons

    • D. 

      Atoms

  • 9. 
    The atomic number of an element tells us the number of protons and neutrons in a specific isotope.
    • A. 

      False

    • B. 

      True

  • 10. 
    The atomic number is the number of protons in the nucleus and it also identifies the element.
    • A. 

      True

    • B. 

      False

  • 11. 
    What makes isotopes of the same element different from each other?
    • A. 

      The number of protons in their nucleus.

    • B. 

      The number of neutrons in their nucleus.

    • C. 

      The number of electrons they have.

  • 12. 
    Which is the correct symbol for an oxygen atom with 8 protons, 9 neutrons and 8 electrons?
    • A. 

      16 O 8

    • B. 

      17 O 8

    • C. 

      18 O 8

    • D. 

      18 O 9

  • 13. 
    A neutral atom has 22 electrons and 24 neutrons.  What is its mass number?
    • A. 

      46

    • B. 

      24

    • C. 

      45

    • D. 

      22

  • 14. 
    A chemical symbol represents the _____ of an element.
    • A. 

      Name

    • B. 

      Reaction

    • C. 

      Group

    • D. 

      Structure

    • E. 

      Type

  • 15. 
    Atoms of the same element with different numbers of neutrons are called _____.
    • A. 

      Isotopes

    • B. 

      Metals

    • C. 

      Metalloids

    • D. 

      Radioactive

    • E. 

      Transition elements

  • 16. 
    A particle that moves around the nucleus is _____.
    • A. 

      An electron

    • B. 

      A proton

    • C. 

      A quark

    • D. 

      A neutron

    • E. 

      An ion

  • 17. 
    A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is _____.
    • A. 

      56

    • B. 

      30

    • C. 

      52

    • D. 

      26

  • 18. 
    The charge on a proton is _____.
    • A. 

      Positive

    • B. 

      Negative

    • C. 

      Neutral

    • D. 

      The same as for an ion

  • 19. 
    The number of protons in an atom is called the _____.
    • A. 

      Atomic number

    • B. 

      Electron

    • C. 

      Proton

    • D. 

      Mass number

    • E. 

      Neutron

  • 20. 
    The charge on a neutron is _____.
    • A. 

      Positive

    • B. 

      Negative

    • C. 

      Neutral

    • D. 

      The same as for an ion

  • 21. 
    The charge on an electron is _____.
    • A. 

      Positive

    • B. 

      Negative

    • C. 

      Neutral

    • D. 

      The same as for an ion

  • 22. 
    The central core of an atom is called the _____.
    • A. 

      Nucleus

    • B. 

      Atomic number

    • C. 

      Proton

    • D. 

      Electron

    • E. 

      Neutron

  • 23. 
    The mass of a(n) _____ is about equal to the mass of a proton.
    • A. 

      Neutron

    • B. 

      Atomic number

    • C. 

      Electron

    • D. 

      Nucleus

  • 24. 
    The total number of protons and neutrons in an atom is the atom’s _____.
    • A. 

      Mass number

    • B. 

      Atomic number

    • C. 

      Weight

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