Which of the following is the lightest metallic element?
A
Mg
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B
Al
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C
Li
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D
Mn
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Solution
The correct option is C Li A light metal is any metal of low relatively density. Mg has density of 1.7 g/cc, Al has 2.7g/cc while Lithium is the lightest of all with minimum density of 0.534 g /cc.