Boron Has Primarily Two Isotopes,one with an Atomic Mass of 11

question 75

Multiple Choice

Boron has primarily two isotopes,one with an atomic mass of 11 amu and another with an atomic mass of 10 amu.If the abundance of the boron atom with a mass of 11 amu is 18.9 percent and the abundance of the other isotope is 81.1 percent,what would be the average mass of the boron atom?

• A)10.19 amu
• B)11 amu
• C)10 amu
• D)10.81 amu
• E)not enough information given

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Definitions:

Beta Rhythm

The rhythmic pattern in the brain’s electrical activity often observed when a person is actively thinking about some specific topic.

Consciousness

The quality or state of being aware of an external object or something within oneself, regarded as a defining aspect of the human experience.

EEG

A test that detects electrical activity in the brain using small, flat metal discs attached to the scalp.

Prefrontal Cortex

refers to the front part of the frontal lobe of the brain, which is involved in complex cognitive behavior, personality expression, decision making, and moderating social behavior.