Learning Path
Question & Answer
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Potassium is a gas at room temperature.
Potassium reacts vigorously with water to produce potassium hydroxide and hydrogen gas.
Potassium has a higher melting point than sodium.
Potassium is less reactive than lithium.
Understanding the Answer
Let's break down why this is correct
When potassium touches water, it gives up its single outer electron and reacts quickly. Other options are incorrect because Metals are solid at room temperature, not gases; Heavier alkali metals do not have higher melting points.
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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