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Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively

Chemistry, Science and Technology

Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?

(a)

Lithium and mercury

(b)

Lithium and osmium

(c)

Aluminum and osmium

(d)

Aluminum and mercury

Answer:

(b)

Explanation

Lithium is the lightest metal, and osmium is the heaviest metal.