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Atomic Theory

Quiz by Tim Bishop

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16 questions
Show answers
  • Q1

    Democritus named the smallest particles of matter _____ because they could not be divided.

    neutrons

    protons

    cells

    atoms

    20s
  • Q2

    True or False? John Dalton gathered evidence for the existence of atoms by measuring the masses of elements that reacted to form compounds.

    False

    True

    Neither

    Maybe

    20s
  • Q3

    Objects with like charges _____ each other.f

    attract

    repel

    jump over

    ignore

    20s
  • Q4

    In Thomson's experiment, he concluded that the particles in the glowing beam had a(n) _____ charge because they were attracted to a positive plate.

    negative

    neutral

    extra

    positive

    20s
  • Q5

    Which of these did Rutherford conclude from the gold foil experiment?

    Thomson's model of the atom was correct

    An atom's positive charge is concentrated in its nucleus

    An atom's negative charge is concentrated in its nucleus

    An atom's positive charge is spread evenly throughout the atom

    20s
  • Q6

    The subatomic particle with a positive charge is the _____.

    nucleus

    neutron

    electron

    proton

    20s
  • Q7

    Which of these is NOT a property that varies among subatomic particles?

    location in the atom

    charge

    color

    mass

    20s
  • Q8

    True or False: Two atoms of the same element can have different numbers of protons.

    Maybe

    Neither

    False

    True

    20s
  • Q9

    True or False: Two different elements can have the same atomic number.

    True

    Maybe

    Neither

    False

    20s
  • Q10

    Every atom of a given element does NOT have the same number of _____.

    neutrons

    nuclei

    electrons

    protons

    20s
  • Q11

    All oxygen atoms have 8 protons. How many neutrons does an atom of oxygen-18 have?

    8

    18

    10

    9

    20s
  • Q12

    How is Bohr's model of the atom different from Rutherford's model?

    Bohr's model focused on the neutrons.

    Bohr's model focused on the electrons.

    Bohr's model focused on the protons.

    Bohr's model focused on the nucleus.

    20s
  • Q13

    True or False: When electrons release energy, some of the energy may be released as visible light.

    True

    Neither

    Maybe

    False

    20s
  • Q14

    True or False: Bohr's model was correct in assigning energy levels to electrons.

    False

    Maybe

    True

    Neither

    20s
  • Q15

    True or False: Scientists use the electron cloud model to describe the exact location of electrons around the nucleus.

    Maybe

    True

    False

    Neither

    20s

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