Some Important Elements MCQs with Answers

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The melting point is highest for the elements of group IVA (Group 14), due to the giant covalent network structure of carbon (diamond) which has an exceptionally high melting point.

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The chemical symbol of carbon is C.

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Both Helium and Argon are noble gases, so the correct answer is Both A and B.

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All of these — Sodium, Potassium, and Rubidium can all form super oxides because alkali metals (especially heavier ones like K, Rb, Cs) readily react with excess oxygen to produce superoxides (MO₂).

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The colour of Chromium(II) complex in open air changes to green due to oxidation to Chromium(III).

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Silicon (Si) is a metalloid, exhibiting properties intermediate between metals and non-metals.

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The molecular (atomic) mass of carbon is 12 amu (atomic mass units).

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The most abundant isotope of uranium found in nature is Uranium-238, constituting about 99.3% of natural uranium.

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The letter J is the only letter of the English alphabet that does not appear in the periodic table as a symbol for any element.

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Polonium (Po) is a radioactive element discovered by Marie and Pierre Curie.