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Atomic Theory

Quiz by Robert Stephenson

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20 questions
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  • Q1
    When creating the Periodic Table, Mendeleev arranged the elements in a particular order. The elements in the Periodic Table today are ordered according to which of the following?
    Atomic number
  • Q2
    Elements are organized in the Periodic Table according to the similarities of their properties. For example, the metals are all together. Where are the metals located on the Periodic Table?
    On the left and in the center
    Toward the bottom of the Periodic Table
    On the right and in the center
    Toward the top of the Periodic Table
  • Q3
    Which subatomic particles make up the nucleus of an atom?
    Question Image
    Protons and electrons
    Neutrons and protons
  • Q4
    Scientific models serve an important function. Why are scientific models important?
    They rarely change as the understanding of a system changes.
    They allow scientists to study systems that are difficult to be observed directly.
    They make it more difficult for scientists to understand how systems work.
    They prove scientific theories by showing the details of a system.
  • Q5
    The atomic models shown were developed over time in order from left to right: first Thomson’s model, then Rutherford’s, and finally, the current model of the atom.
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    Atoms cannot be represented using a model.
    Models can be changed or replaced as new evidence is discovered.
    There are multiple correct ways to show the structure of an atom.
    Scientists cannot agree on which model to use.
  • Q6
    Elements in the Periodic Table are arranged into columns and rows. What is the name given to columns in the Periodic Table?
  • Q7
    Scientists in all branches of science have developed scientific theories. Which of the following statements is true about all scientific theories?
    Scientific theories are based on the work of individual scientists.
    Scientific theories are based on large amounts of evidence.
    Scientific theories are not widely accepted when they are first developed.
    Scientific theories will become scientific laws if enough scientists support them.
  • Q8
    The Periodic Table contains all of the known elements. Which elements in the Periodic Table have similar properties?
    Two elements in the same group
    A metal and a noble gas
    Two elements in the same period
    A metal and a nonmetal
  • Q9
    Janna discovered that sodium (Na) is found in Group 1 on the Periodic Table. Where should Janna look for another element that has similar properties?
    On the opposite side of the table
    In the same column (vertical)
    For names that begin with the letter N
    In the same row (horizontal)
  • Q10
    Using the Periodic Table, scientists can predict the properties of elements. Which of the following pairs of elements have properties that are the least similar?
    Ge and Br
    N and P
    He and Xe
    Cl and I
  • Q11
    According to the Atomic Theory, elements are made up of small units. What is the name for the smallest unit of an element that can still be classified as that element?
    A mixture
    A molecule
    An atom
    A compound
  • Q12
    An atom contains several different types of subatomic particles. Which statement is true about the mass of an atom?
    The mass of an atom is determined by the number of particles in its nucleus.
    The mass of an atom is evenly distributed among its particles.
    The mass of an atom is not related to the number of protons or neutrons it has.
    The mass of an atom depends on the number of electrons it has.
  • Q13
    The subatomic particles in an atom have various charges. Which of the following subatomic particles has a negative charge?
  • Q14
    Most versions of the Periodic Table contain a zigzag line that runs down and to the right as on the part of the table shown. This zigzag line separates this part of the Periodic Table into two sections. What is the purpose of the line?
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    To separate the metals from the nonmetals
    To separate the solids from the liquids
    To separate magnetic elements from nonmagnetic elements
    To separate the gases from the solids
  • Q15
    Developed at the beginning of the nineteenth century, John Dalton’s Atomic Theory stated that all atoms of a given element are identical in mass and properties. More than one hundred years later, scientists learned that atoms of the same element could have different masses. This discovery seemed to contradict Dalton’s theory. Knowing how theories are developed, what should scientists have done next?
    The theory should not have been revised and will not ever be changed.
    The theory was only a guess, so it should have been discarded.
    The theory was disproved, so it should have been eliminated.
    The theory should have been modified to include the new evidence.

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