Which are the only two elements on the periodic table that are liquid at room temperature...? Mcqs

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Which are the only two elements on the periodic table that are liquid at room temperature...?

(A) Mercury and Bromine
(B) Carbon and helium

(C) Nitrogen and Hydrogen
(D) Oxygen and Neon

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Who created periodic table...?

(A) Faraday
(B) Lavoisier

(C) Arrhenius
(D) Mendeleev

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