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The Half-Life of Iron-59 Is 45 Days

question 32

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The half-life of iron-59 is 45 days. After three months, how much of a 72-gram sample of iron-59 is left?


Definitions:

Silicon Tetrahedron

A structural unit in silicate minerals, consisting of four oxygen atoms surrounding a silicon atom in a tetrahedral shape.

Cleavage

The tendency of a mineral to break along flat surfaces as determined by the mineral's crystal structure.

Silicate Mineral

Minerals that contain silicon and oxygen, and sometimes other elements, which make up the majority of the Earth's crust.

Known Minerals

Refers to substances with a definite chemical composition and crystalline structure that have been identified and cataloged by scientists.

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