Cesium-137 Has a Half-Life of 31

question 8

Multiple Choice

Cesium-137 has a half-life of 31.0 y.The time required for the cesium-137 now present to decrease to 1/30 its present value is

• A)930 y
• B)30 y
• C)465 y
• D)152 y
• E)1.6 y

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Definitions:

Monosaccharides

Simple sugars that are the most basic form of carbohydrates, serving as energy sources and building blocks for more complex sugars.

Disaccharides

Carbohydrates composed of two monosaccharide molecules bonded together, such as sucrose and lactose, which are used by organisms as energy sources.

Polysaccharide

A carbohydrate molecule consisting of long chains of monosaccharide units bound together by glycosidic linkages.

Sugars

Carbohydrates that are sweet to taste, soluble in water, and used as a source of energy by living organisms.