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Question
Some elements and their atomic radii are given here. Arrange them in decreasing order of their atomic radii. Identify which of the above elements is the biggest atom and which is smallest?
| Element | K | Na | Rb | Cs | Li |
| Atomic radius (pm) | 231 | 186 | 244 | 262 | 151 |
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Solution
- Decreasing order of atomic radii: Cs > Rb > K > Na > Li
- Cesium (Cs) has the biggest atom and lithium (Li) has the smallest atom.
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