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7.6: Periodic Trends and Chemical Properties

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    Trends

    Exercise \(\PageIndex{1}\)

    Which of the following elements would be expected to have chemical and physical properties most similar to Iodine (I)?

    1. Fluorine (F)
    2. Aluminum (Al)
    3. Magnesium (Mg)
    4. Rubidium (Rb)
    5. Krypton (Kr)
    Answer

    a. Fluorine (F)

    Exercise \(\PageIndex{2}\)

    What is the charge formed by alkaline earth metals when they react with nonmetals?

    a. +1        b. −1        c. +2        d. −2        e. +3

    Answer

    c. +2

    Exercise \(\PageIndex{3}\)

    A metal oxide forms when potassium reacts with oxygen. What is the most likely formula of this metal oxide?

    a. KO        b. K2O        c. K2O3        d. KO2        e. KO3

    Answer

    a. KO

    Exercise \(\PageIndex{4}\)

    A metal phosphide forms when potassium reacts with elemental phosphorus. What is the most likely formula of this metal phosphide?

    a. KP        b. K3P        c. K2P3        d. K3P2        e. KP3

    Answer

    b. K3P

    Exercise \(\PageIndex{5}\)

    A metal halide forms when potassium reacts with elemental chlorine. What is the most likely formula of this metal halide?

    a. KCl        b. KCl2        c. K2Cl        d. KCl3        e. K3Cl2

    Answer

    b. KCl2

    7.6: Periodic Trends and Chemical Properties is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts.

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