What Is the Half-Life of Potassium-40

question 54

Multiple Choice

What is the half-life of potassium-40?

• A)1.3 billion years
• B)704 million years
• C)14.1 billion years
• D)4.5 billion years

---

Definitions:

Psychoanalytic Theory

A theory of personality organization and the dynamics of personality development that guides psychoanalysis, a clinical method for treating psychopathology, developed by Sigmund Freud.

Borderline Personality Disorder

A mental disorder characterized by unstable moods, behaviors, and relationships.

Instability

A state of being unpredictable and prone to change, often leading to chaos or disorder.

Evolutionary Psychology

An approach within social and natural sciences that analyzes psychological structures through the lens of contemporary evolutionary theory.