Suppose a Radioactive Isotope Has a Half-Life of 2

question 5

Short Answer

Suppose a radioactive isotope has a half-life of 2.0 hours. For an initial sample of 6400 nuclei, the number remaining after 6.0 hours is about ________________.

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Definitions:

Rising Mantle

The ascent of mantle material towards the Earth's surface, potentially leading to volcanic activity where the crust is thin.

Descending Plate

A section of the earth's crust that moves downward into the mantle beneath another plate, often responsible for volcanic activity and earthquakes.

Eruptions

Violent expulsions of materials from a volcano or geothermal vent, including lava, ash, and gases.

Accretionary Prism

A prism- or wedge-shaped, structurally complex zone of faults, folds, and mostly metamorphosed rocks that form along the upper parts of a subduction zone; material derived from sediment contributed by adjacent volcanoes or a continent, along with oceanic crust scraped off the downgoing slab.