Boron exists as two stable isotopes; B-10 (19%) and B-11 (81%). Find out the average atomic weight of boron in the periodic table.
Correct answer: D. 10.8
- A. 11.2
- B. 10.2
- C. 10
- D. 10.8
Explanation
Considering that B-11 is more abundant (approx 80%), we can predict the average atomic weight to be nearer to 11 than 10 but still between these two numbers, thus 10.8.
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