1. Which of the following is the lightest metal?
(a) Mercury (b) Silver (c) Lithium (d) Lead
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Answer:
Lithium is the lightest metel.......
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Lithium is the lightest metal.
Explanation:
- Lithium is the first alkali in the periodic table and the lightest known metal. Lithium, atomic number 3, is a multipurpose element.
- It is used in the manufacture of aircraft and in certain batteries.
- It is also used in mental health: lithium carbonate is a common treatment for bipolar disorder, which helps to stabilize wild mood swings caused by illness.
- It reacts easily in water, but does not occur freely in nature due to its activity.
- Lithium is a moderately abundant element and present in Earth's crust at 65 ppm (parts per million).
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