Learning Path
Question & Answer
Choose the Best Answer
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
Potassium is a soft, silver‑grey metal that reacts very fast when it touches water. Other options are incorrect because Many people think metals can be gases because they hear the word "metal." In reality, potassium is a solid at room temperature, like most metals; A common mistake is that heavier elements always melt at higher temperatures.
Key Concepts
Alkali Metals
medium level question
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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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