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JEE Main Chemistry question

ChemistryThe s-Block ElementsJEE Main

Not in JEE Main or NEET syllabus

How many of the following alkali metals have more density than sodium? Li, K, Rb, Cs

Answer: 2

Solution

Density generally increases down Group 1, but potassium is anomalously less dense than sodium owing to its unusually large atomic size (densities: Li 0.53, Na 0.97,

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Question ID VK-138131