If an Isotope Has a Half-Life of 4 Billion Years

question 16

Multiple Choice

If an isotope has a half-life of 4 billion years, then in 4 billion years what will happen?

• A) All of the original amount will have decayed.
• B) A quarter of the original amount will still remain.
• C) Half of the original amount will still be present.
• D) All of the original amount will still be present.
• E) The original amount will have doubled.

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Definitions:

Ornithophobia

An abnormal and irrational fear of birds, often resulting in avoidance behavior and distress in the presence of birds.

Behavioral Treatment

A range of therapeutic interventions aimed at modifying maladaptive behaviors through learning principles, such as reinforcement, to improve mental health and functionality.

Caged Birds

Birds that are kept in captivity inside cages, often as pets, which may impact their behavior and physical health.

Modeling

Process of learning behaviors by imitating others, especially authority figures or people like oneself.