Chem Lesson 2.4

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    The data table below shows elements Xx, Yy, and Zz from the same group on the Periodic Table. What is the most likely atomic radius of element Yy? - ProProfs

    The data table below shows elements Xx, Yy, and Zz from the same group on the Periodic Table. What is the most likely atomic radius of element Yy?

    • 103 pm
    • 127 pm
    • 166 pm
    • 185 pm
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Chem Lesson 2.4 - Quiz
About This Quiz

These questions deal with trends in atomic radii. look at table S if you have any questions.

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  • 2. 

    An atom of which element has the largest atomic radius?

    • Fe

    • Mg

    • Si

    • Zn

    Correct Answer
    A. Mg
    Explanation
    Mg is in group 2...as you move to the left of the periodic table, the radii increase.

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  • 3. 

    Which list of elements from Group 2 on the Periodic Table is arranged in order of increasing atomic radius?

    • Be, Mg, Ca

    • Ca, Mg, Be

    • Ba, Ra, Sr

    • Sr, Ra, Ba

    Correct Answer
    A. Be, Mg, Ca
    Explanation
    Look at the sheet we made in class. As you go down a group, more orbitals are added...the radius increases.

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  • 4. 

    As atomic number increases within Group15on the Periodic Table, atomic radius

    • Decreases, only

    • Increases, only

    • Decreases, then increases

    • Increases, then decreases

    Correct Answer
    A. Increases, only
    Explanation
    As atomic number increases within Group 15 on the Periodic Table, the atomic radius increases, only. This is because as you move down the group, each successive element has one more energy level than the previous one. The additional energy level increases the distance between the nucleus and the outermost electron, resulting in a larger atomic radius.

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  • 5. 

    An element that is malleable and a good conductor of heat and electricity could have an atomic number of

    • 16

    • 18

    • 29

    • 35

    Correct Answer
    A. 29
    Explanation
    29 is a metal. Metals are malleable (bendable) and they conduct electricity.

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  • 6. 

    The elements in Period 5 on the Periodic Table are arranged from left to right in order of

    • Decreasing atomic mass

    • Decreasing atomic number

    • Increasing atomic mass

    • Increasing atomic number

    Correct Answer
    A. Increasing atomic number
    Explanation
    The Periodic Table is arranged according to atomic number (# of protons). Just to verify this, you can look at the periodic table and notice the atomic mass fluctuates for transition elements (those elements in groups 3-12). The only possible option is INCREASING ATOMIC NUMBER.

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  • 7. 

    Explain, in terms of atomic structure, why the elements in Group 2 have similar chemical properties.    [1]

    Correct Answer
    they have the same valence electrons
    same valence electrons
    same valence electron
    2
    2 valence e
    2 valence elecctrons
    Explanation
    Same group, same valence electron. Same valence electrons, similar chemical properties.

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  • 8. 

    How do the atomic radius and metallic properties of sodium compare to the atomic radius and metallic properties of phosphorus?

    • Sodium has a larger atomic radius and is more metallic.

    • Sodium has a larger atomic radius and is less metallic.

    • Sodium has a smaller atomic radius and is more metallic.

    • Sodium has a smaller atomic radius and is less metallic.

    Correct Answer
    A. Sodium has a larger atomic radius and is more metallic.
    Explanation
    Sodium is in group 1. GROUP 1 elements have the largest radii of any element in the same period.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 05, 2011
    Quiz Created by
    Ionca
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