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What percentage of hydrogen atoms are protium?
A99.685
B99.985
C99.885
D99.785
Answer & Solution
Correct answer: B. 99.985
1. Almost all hydrogen is this one isotope.
2. 99.985 per cent of hydrogen atoms contain only one proton.
3. So the correct answer is 99.985.
_Source: syllabus Chemistry, Ch 2 'Structure of Atom'_
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