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| Q. |
Which of the following is the lightest metal? |
| A. | Mercury |
| B. | Silver |
| C. | Lithiu |
| D. | Lead |
| Answer» C. Lithiu | |
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Explanation: The lightest or least dense metal that is a pure element is lithium, which has a density of 0.534 g/cm3. This makes lithium nearly half as dense as water, so if lithium was not so reactive, a chunk of the metal would float on water. |
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