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Atomic Structure

Quiz by Entela Ndrecka

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35 questions
Show answers
  • Q1
    The law of conservation of mass follows from the concept that
    atoms can be destroyed in chemical reactions.
    atoms are indivisible.
    matter is composed of atoms.
    atoms of different elements have different properties.
    30s
  • Q2
    The composition of the two oxides of lead, PbO and PbO2, are explained by the
    atomic law.
    law of conservation of mass.
    law of multiple proportions.
    periodic law.
    30s
  • Q3
    Who first proposed an atomic theory based on scientific knowledge?
    Dmitri Mendeleev
    Robert Brown
    Jons Berzelius
    John Dalton
    30s
  • Q4
    According to Dalton’s atomic theory, atoms
    of each element are identical in size, mass, and other properties.
    are destroyed in chemical reactions.
    can be divided.
    of different elements cannot combine.
    30s
  • Q5
    Which of the following is NOT part of Dalton’s atomic theory?
    In chemical reactions, atoms are combined, separated, or rearranged.
    Atoms cannot be divided, created, or destroyed.
    The number of protons in an atom is its atomic number.
    All matter is composed of extremely small particles called atoms.
    30s
  • Q6
    The law of definite proportions
    replaced the law of conservation of mass.
    b. was explained by Dalton’s atomic theory.
    assumes that atoms of all elements are identical.
    contradicted Dalton’s atomic theory.
    30s
  • Q7
    In a cathode tube, electrical current passes from one electrode, the _____, to the
    Both (a) and (c)
    anode
    cathode
    negatively charged electrode
    30s
  • Q8
    Experiments with cathode rays led to the discovery of the
    neutron.
    nucleus.
    electron.
    proton.
    30s
  • Q9
    Who explained the behavior of positively charged particles being deflected from a metal foil as the nucleus?
    John Dalton
    Ernest Rutherford
    James Chadwick
    Niels Bohr
    30s
  • Q10
    In the gold foil experiment, most of the particles fired at the foil
    passed through the foil.
    were absorbed by the foil.
    bounced back.
    combined with the foil.
    30s
  • Q11
    The gold foil experiment led to the discovery of the
    neutron.
    cathode ray.
    nucleus.
    electron.
    60s
  • Q12
    What did Rutherford conclude about the structure of the atom?
    Electrons make up the center of an atom.
    An atom contains a small, dense, positively charged central region.
    An atom is indivisible.
    An atom carries a positive charge.
    60s
  • Q13
    A nuclear particle that has about the same mass as a proton, but with no electrical charge, is called a(n)
    neutron.
    isotope.
    electron.
    nuclide.
    60s
  • Q14
    Which part of an atom has a mass approximately equal to 1/2000 of the mass of a common hydrogen atom?
    proton
    electron
    nucleus
    electron cloud
    60s
  • Q15
    The mass of a neutron is
    about the same as that of an electron.
    about the same as that of a proton.
    double that of a proton.
    double that of an electron.
    60s

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