NSSCAS Chemistry (8224) Practice Questions - Namibia Senior Secondary Certificate Advanced Subsidiary Level Chemistry (Syllabus 8224) Exam

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An element has isotopes with mass numbers 63 (69.2% abundance) and 65 (30.8% abundance). What is its relative atomic mass to three significant figures?

63.0 63.6 64.0 65.0

Correct Answer:

63.6

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