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Question
Why do alkali metals have low density?
Why do alkali metals have low density?
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Solution
Alkali Metals: Alkali metals are the elements of group 1 because these elements react with water to form an alkaline solution with the evolution of hydrogen gas.
Example: Lithium (Li), Sodium (Na), etc.
Density is defined as the ratio of mass to volume.
- Alkali metals have low atomic mass and large atomic size.
- Due to the large atomic size, the volume of alkali metal is large.
- Hence, the density of alkali metal is low.
Alkali Metals: Alkali metals are the elements of group 1 because these elements react with water to form an alkaline solution with the evolution of hydrogen gas.
Example: Lithium (Li), Sodium (Na), etc.
Density is defined as the ratio of mass to volume.
- Alkali metals have low atomic mass and large atomic size.
- Due to the large atomic size, the volume of alkali metal is large.
- Hence, the density of alkali metal is low.
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