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Atomic Structure

Quiz by Tomekka Williams

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10 questions
Show answers
  • Q1
    How many protons, neutrons and electrons are present in an atom of Hafnium, Hf, with a mas number of 178?
    178 protons, 250 neutrons, 72 electrons
    72 protons, 106 neutrons, 72 electrons
    106 protons, 72 neutrons, 106 electrons
    72 protons, 106 neutrons, 178 electrons
    30s
  • Q2
    What is the atomic mass of Neon rounded to the nearest whole number?
    Question Image
    20
    10
    20.18
    10.18
    30s
  • Q3
    What element is represented in this Bohr Model?
    Question Image
    Lithium
    Carbon
    Hydrogen
    Aluminum
    30s
  • Q4
    What subatomic particle of an atom always determines the element’s identity?
    Neutrons
    Protons
    Electrons
    Megatrons
    30s
  • Q5
    An atom of a certain element has 36 protons, 36 electrons and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom?
    84 neutrons
    48 neutrons
    58 neutrons
    36 neutrons
    30s
  • Q6
    In the early 1900's Ernest Rutherford completed an experiment that changed the concept of an atom. His discovery led to the understanding that an atom is mostly made up of empty space with -
    electrons orbiting a dense nucleus made up of protons and neutrons
    protons orbiting a dense nucleus made up of electrons and neutrons
    electrons and neutrons orbiting a cloud of protons
    protons and neutrons orbiting a cloud of electrons
    30s
  • Q7
    A model of a beryllium atom is shown. What type of particles are in the cloud surrounding the atoms nucleus?
    Question Image
    negatively and positively charged particles
    positively charged particles
    negatively charged particles
    positive particles and particles with no charge
    30s
  • Q8
    What is the mass number of a potassium (K) atom that has 20 neutrons?
    18
    20
    39
    19
    30s
  • Q9
    An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atoms nucleus?
    -25
    +25
    +30
    -30
    30s
  • Q10
    Which of the following best describes an electron?
    It has a positive charge much more mass than a neutron
    It has no charge about the same mass a proton
    It has a negative charge much less than a proton
    It has a negative charge and about the same mass of a neutron
    30s

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