Solve this multiple-choice question and choose the correct option.

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Atomic masses: identify the element with the smallest atomic mass among the given choices Compare standard atomic masses at natural isotopic abundance for Oxygen, Sulphur, Nitrogen, and Carbon. Choose the correct option.

Difficulty: Easy

Oxygen
Sulphur
Nitrogen
Carbon

Correct Answer: Carbon

Explanation:

Given dataApproximate standard atomic masses (u): O ≈ 16, S ≈ 32, N ≈ 14, C ≈ 12.

Concept/ApproachAtomic mass reflects the weighted average mass of naturally occurring isotopes. To find the minimum, compare the known approximate values.

Step-by-step checkCompare: 12 (C) < 14 (N) < 16 (O) < 32 (S)

Common pitfallsDo not confuse atomic number with atomic mass; also, sulphur's mass is roughly double oxygen's.

Final AnswerCarbon

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