If We Start with 1

question 114

Multiple Choice

If we start with 1.000 g of cobalt-60, 0.400 g will remain after 7.00 yr. This means that the half-life of cobalt-60 is ________ yr.

• A)12.1
• B)17.5
• C)2.80
• D)5.30
• E)7.65

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Definitions:

Albert Ellis

An American psychologist known for developing Rational Emotive Behavior Therapy (REBT), a form of psychotherapy that focuses on resolving emotional and behavioral problems.

Irrational Beliefs

Thoughts that are not based on reality or logical reasoning, often leading to negative emotions or actions.

Self-schema

Cognitive representations of oneself that guide the processing of self-relevant information.