Metals are actually very hard. However, there are a few metals which are so soft that they can be easily cut with a knife. Identify such a metal from the given options.
A
Lithium
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B
Carbon
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C
Silver
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D
Calcium
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Solution
The correct option is ALithium Alkali metals (Li, Na, K) are so soft that they can be cut with a knife. They have low densities and low melting points.