Silicon, Which Makes Up About 25% of Earth's Crust by Mass

question 18

Multiple Choice

Silicon, which makes up about 25% of Earth's crust by mass, is used widely in the modern electronics industry. It has three naturally occurring isotopes, ²⁸Si, ²⁹Si, and ³⁰Si. Calculate the atomic mass of silicon.

• A) 29.2252 amu
• B) 28.9757 amu
• C) 28.7260 amu
• D) 28.0855 amu
• E) 27.9801 amu

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Definitions:

Preferences

Individual likings or choices among various options or alternatives.

Hindsight Bias

The tendency to believe, after an event has occurred, that one would have predicted or expected the outcome, often referred to as the "I knew it all along" phenomenon.

Representativeness Heuristic

A cognitive shortcut where the likelihood of an object belonging to a category is judged based on how typical the object appears to be of that category.

Phases of Decision Making

Describes the sequence of steps from identifying a problem or opportunity, through to the final choice and its implementation.