Technetium-99m,used to Image the Heart and Brain,has a Half-Life of 6.00

question 49

Multiple Choice

Technetium-99m,used to image the heart and brain,has a half-life of 6.00 h.What fraction of technetium-99m remains in the body after 1 day?

• A)0.0625
• B)0.250
• C)0.0313
• D)0.125

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Definitions:

HBr

Hydrobromic acid, a strong acid formed by dissolving hydrogen bromide in water, used in chemical synthesis.

Basic Mechanism

Fundamental processes describing the simplest form of how reactions occur at a molecular level, often foundational to more complex mechanisms.

Organic Chemistry

A branch of chemistry that studies the structure, properties, composition, reactions, and preparation of carbon-containing compounds, which include not only hydrocarbons but also compounds with any number of other elements, including hydrogen, nitrogen, oxygen, halogens, phosphorus, silicon, and sulfur.

Reaction

A method whereby one or more materials (known as reactants) are transformed into one or more distinct materials (referred to as products).