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

question 42

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:

Fair Value

The financial return from disposing of an asset or expense of transferring a liability in a systematic transaction with market entities at the point of measurement.

Carrying Value

The book value of assets and liabilities as reported on the balance sheet, reflecting original cost adjusted for depreciation, amortization, and impairments.

Restricted Fund

Funds that are earmarked for a specific purpose by the donor or governing body and cannot be used for general expenses.

Capital Fund

A reserve of capital that can be used for investment, growth, or to cover future liabilities or expenditures.