Learning Path
Question & Answer
Choose the Best Answer
Sodium will float on water and produce hydrogen gas, showing its reactivity with water.
Sodium will dissolve completely without any reaction, indicating it is non-reactive.
Sodium will sink and form a solid layer on the bottom, which shows it is denser than water.
Sodium will explode immediately upon contact with water, demonstrating its volatility.
Understanding the Answer
Let's break down why this is correct
Sodium floats because it is lighter than water. Other options are incorrect because The idea that sodium just dissolves ignores its reactivity; Sodium is less dense than water, so it does not sink.
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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