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 The d- and f- Block Elements 30 Flashcards |
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Fill in the blanks: d-Block elements are characterized by the presence of ___ electrons in their ___ orbitals. |
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D, penultimate  |
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What distinguishes f-Block elements from d-Block elements? |
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f-Block ElementsDistinction Between f-Block and d-Block Elements
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True or False: Transition elements are defined as elements with completely filled d-orbitals. |
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False. Transition elements have partially filled d-orbitals.  |
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Which d-Block element has the most variable oxidation states and what are the ranges of those states? |
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Manganese (Mn), which exhibits oxidation states from +2 to +7.  |
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What is the primary reason for the high melting and boiling points of d-Block elements? |
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Strong Metallic BondingThe Properties of d-Block Elements
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Riddle: I am a metal that can exist in multiple oxidation states, and my highest state is +7. Who am I? |
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Manganese (Mn)  |
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Fill in the blank: Potassium dichromate is a strong oxidizing agent in ___ medium. |
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Acidic |
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What effect does pH have on potassium dichromate in alkaline conditions? |
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In alkaline medium, it converts to yellow chromate (Cr₂O₇²⁻ ⇌ 2CrO₄²⁻).  |
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List two physical properties of transition metals. |
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High tensile strength, malleability  |
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True or False: Lanthanoid contraction refers to the decrease in atomic size across the f-Block elements due to increased shielding by 4f electrons. |
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FalseUnderstanding Lanthanoid Contraction
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What is the primary electronic configuration pattern for lanthanoids? |
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[Xe] 4f¹⁻¹⁴ 5d⁰⁻¹ 6s²  |
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Which d-Block element is an exception for having a filled d-orbital in its common oxidation state and what is that state? |
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Zinc (Zn), which has a d¹⁰ configuration.  |
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Riddle: I am known for my purple color and strong oxidizing capabilities in any medium. What am I? |
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Potassium permanganate (KMnO₄)  |
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What is the general trend of ionization enthalpies across the d-Block elements? |
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Ionization EnthalpiesTrends in d-Block Elements
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What leads to the color of ions in d-Block and f-Block elements? |
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The color is due to d-d or f-f electronic transitions in partially filled orbitals.  |
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