Examlex
What is the rate constant for the decay of some unknown radioactive compound if the half-life for the beta decay is 1.3 × 109 years?
Mental Operations
The processes of thinking and reasoning, including problem-solving, decision-making, and the manipulation of abstract concepts.
Object Permanence
The understanding in infants and young children that objects continue to exist even when they are not visible.
Sensory Perceptions
The process of receiving and interpreting information from the external world through the sensory organs.
Preoperational Thinking
A stage in cognitive development where children from about 2 to 7 years of age are able to use language and symbols but not capable of logical reasoning.
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