Chem Lesson 3.2b Hw

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Quizzes Created: 33 | Total Attempts: 37,544
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    Write the formula for strontium chloride

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  • 2. 

    What is the formula of magnesium iodide?

    Explanation
    Magnesium is +2. iodine is -1. You need 2 iodides to balance out 1 magnesium.

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  • 3. 

    What is the formula of aluminum oxide?

    Explanation
    Aluminum is +3 charge. Oxygen is -2 charge. If they both totaled 6, they could balance each other. 2 aluminums (at +3 each) total +6. 3 oxides (at -2 each) total -6. BOOM!! BALANCED!!

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  • 4. 

    What is the formula for cesium sulfide?

    Explanation
    Cesium is +1. Sulfur is -2. 2 cesiums for every 1 sulfur.

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  • 5. 

    What is the name of Li2O? (MUST BE SPELLED CORRECTLY)

    Explanation
    Lithium + oxygen = lithium oxide.

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  • 6. 

    What is the name of BeO?

    Explanation
    metal doesn't change the name. if it's a nonmetal element, it becomes -ide, as in OXIDE.

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  • 7. 

    Identify the element in Period 3 of the Periodic Table that reacts with oxygen to form an ionic compound represented by the formula X2O.    [1]

    Explanation
    sodium is the only Period 3 element that has 1 valence electron. Oxide ions have a charge of -2, which is balanced by 2 X ions, each with a +1 charge.

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  • 8. 

    Explain, in terms of electrons, why the bonding in NaCl is ionic. [1]

    Explanation
    The valence electron from Na is transferred to Cl.

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  • 9. 

    Explain, in terms of electrons, why the ionic radius of a Group 2 element is smaller than its atomic radius.    [1]

    Explanation
    The ionic radius of a Group 2 element is smaller than its atomic radius because it loses valence electrons. When a Group 2 element forms an ion, it loses two valence electrons, resulting in a decrease in the electron cloud surrounding the nucleus. This loss of electrons reduces the size of the ion compared to the neutral atom, leading to a smaller ionic radius. Additionally, the ion has more protons than electrons, which further contributes to the reduction in size. The terms "fewer electron orbitals," "lost valence electrons," "fewer valence electrons," "more protons than electrons," and "lost an electron orbital" all explain why the ionic radius is smaller. The terms "fewer electrons" and "less electrons" also imply the loss of valence electrons.

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  • 10. 

    Which type of bond is formed when electrons are transferred from one atom to another?

    • Covalent

    • Hydrogen

    • Metallic

    • Ionic

    Correct Answer
    A. Ionic
    Explanation
    The only type of bond we have talked about so far is IONIC. Besides, the metals lose their electrons to nonmetals, which is what happens during ionic bond formation.

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  • 11. 

    Which Lewis electron-dot structure is drawn correctly for the atom it represents?

    Correct Answer
    A.
    Explanation
    Neon has 8 valence electrons. 8 dots match the 8 valence electrons.

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  • 12. 

    Which element forms an ionic compound when it reacts with lithium?

    • K

    • Fe

    • Kr

    • Br

    Correct Answer
    A. Br
    Explanation
    Bromine (Br) forms an ionic compound when it reacts with lithium. This is because bromine is a halogen and has a tendency to gain one electron to achieve a stable octet configuration. Lithium, on the other hand, has a tendency to lose one electron. Therefore, when lithium reacts with bromine, lithium loses one electron and bromine gains one electron, resulting in the formation of an ionic compound.

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  • 13. 

    An ionic compound is formed when there is a reaction between the elements

    • Strontium and chlorine

    • Hydrogen and chlorine

    • Nitrogen and oxygen

    • Sulfur and oxygen

    Correct Answer
    A. Strontium and chlorine
    Explanation
    Strontium loses electrons and chlorine gains electrons.

    The electronegativity difference is 2.2, which makes it IONIC.

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  • 14. 

    The bonds in BaO are best described as

    • Covalent, because valence electrons are shared

    • Covalent, because valence electrons are transferred

    • Ionic, because valence electrons are shared

    • Ionic, because valence electrons are transferred

    Correct Answer
    A. Ionic, because valence electrons are transferred
    Explanation
    Ionic bonds involve transferring electrons. BaO is ionic.

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  • 15. 

    The compound XCl is classified as ionic if X represents the element

    • H

    • I

    • Rb

    • Br

    Correct Answer
    A. Rb
    Explanation
    RbCl has an electronegativity difference of 2.4, which makes it IONIC.

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  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 23, 2011
    Quiz Created by
    Ionca
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