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Question & Answer
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Its higher density compared to sodium
Its ability to react with water at low temperatures
Its lower melting point than lithium
Its unique coloration in flame tests
Understanding the Answer
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When potassium vapor is heated, it emits a light purple color in a flame test. Other options are incorrect because Density is not a distinguishing feature; All alkali metals react strongly with water, even at room temperature, and potassium is no exception.
Key Concepts
Alkali Metals
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Deep Dive: Alkali Metals
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Definition
Alkali metals are a group of elements following the noble gases in the Periodic Table. They exhibit unique physical and chemical properties, including reactivity with water, halogens, and hydrogen. Understanding the properties of alkali metals is essential for predicting their behavior in chemical reactions.
Topic Definition
Alkali metals are a group of elements following the noble gases in the Periodic Table. They exhibit unique physical and chemical properties, including reactivity with water, halogens, and hydrogen. Understanding the properties of alkali metals is essential for predicting their behavior in chemical reactions.
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