The Half-Life of a Radioactive Substance Is 5 Min

question 13

Multiple Choice

The half-life of a radioactive substance is 5 min.Which of the following statements is true of the decay of this substance?

• A)After 10 min,one-fourth of the original substance remains.
• B)The amount of the substance remaining after a given time is proportional to the number of minutes.
• C)The amount of the substance remaining after a given time is inversely proportional to the number of minutes.
• D)After 10 min,none of the original substance remains unchanged.
• E)None of these is correct.

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Definitions:

Excited Motor Activity

Refers to heightened physical activity that can be due to various neurological or psychological conditions, often characterized by restlessness or rapid movements.

Catatonic Schizophrenic

A subtype of schizophrenia characterized by severe disturbances in movement, including rigidity, posturing, and mutism.

Disorganized Schizophrenic

A subtype of schizophrenia characterized by disorganized speech, behavior, and flat or inappropriate affect.

Undifferentiated Schizophrenic

A category of schizophrenia where symptoms do not clearly fit the criteria for other subtypes, showcasing a mix of features.