A Sample Contains 1000 Nuclei of a Radioactive Isotope of Barium

question 30

Multiple Choice

A sample contains 1000 nuclei of a radioactive isotope of barium. Exactly sixty seconds later, 970 nuclei in the sample have decayed. Determine the half-life of this isotope.

• A)10 s
• B)12 s
• C)14 s
• D)16 s
• E)18 s

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Definitions:

Flood Basalts

Large-volume basaltic lava flows that cover vast areas.

Magma Chambers

Reservoirs beneath Earth's surface containing molten rock, crucial to the process of volcanic activity and the formation of igneous rocks.

Crystal Setting

The process or arrangement by which crystals are positioned or embedded within a piece of jewelry or a geological matrix.

Rock Walls

Natural or man-made vertical structures made of rock, often serving as boundaries, fortifications, or geological features.