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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Neo-Freudians

Psychologists who were influenced by Freud's theories but developed their own distinct psychological theories and models, often diverging significantly in their emphasis on social and environmental factors in personality development.

Freud

Sigmund Freud, an Austrian neurologist known as the founding father of psychoanalysis, a method for treating psychopathology through dialogue.

Neo-Freudians

A group of psychologists who, while inspired by Freud's theories, extended his ideas to include social and cultural factors in personality development and dynamics.