Two Radioactive Isotopes,X and Y,both Decay to Stable Products

question 135

Multiple Choice

Two radioactive isotopes,X and Y,both decay to stable products.The half-life of X is about a day,while that of Y is about a week.Suppose a radioactive sample consists of a mixture of these two nuclides.If the mixture is such that the activities arising from X and Y are initially equal,then a few days later the activity of the sample will be due

• A)predominantly to Y.
• B)predominantly to X.
• C)entirely to Y.
• D)to X and Y equally.

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Definitions:

Attentional Resources

The cognitive capacity or energy available to a person for processing information and maintaining attention.

Mixed Perceptions

The blending of different sensory inputs or cognitive assessments to form a complex understanding or interpretation.

Automatic Processing

The unconscious, fast, and effortless processing of information, which does not require deliberate thought.

Conscious Awareness

is the state of being consciously aware of one’s surroundings, thoughts, and feelings at any given moment.