The Two Most Abundant Isotopes of Boron Are ¹⁰B and ¹¹B

question 118

Multiple Choice

The two most abundant isotopes of boron are ¹⁰B and ¹¹B, with ¹¹B being about 4 times more abundant. In the mass spectrum of trimethylborate [(CH₃O) ₃B], ________.

• A) the peaks at m/z 103 and m/z 104 have equivalent intensities
• B) the peak at m/z 103 has an intensity which is 4 times that of the m/z 104 peak
• C) the peak at m/z 103 has an intensity which is 1/4 the intensity of the peak at m/z 104
• D) none of the above

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Definitions:

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The process by which new bone tissue is added on the surface of existing bones, contributing to the increase in bone diameter.

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Endochondral Ossification

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Cartilage Matrix

The intercellular substance of cartilage, made up of collagen fibers and proteoglycans, providing structural support and cushioning.