Examlex
Pure rubidium crystallizes in a body-centered cubic lattice; the edge length of the unit cell is 562 pm. What is the density of rubidium in grams per cubic centimeter?
Formal Operations
The fourth and final stage in Piaget's theory of cognitive development, characterized by the ability to think abstractly and reason logically.
2-Year-Old
A 2-Year-Old is a child at the age of two years, characterized by rapid development in language, motor skills, and the beginnings of symbolic thought.
Cognitive Development
The process by which an individual's ability to think, reason, and understand the world around them grows and evolves over time.
Piaget
Refers to Jean Piaget, a Swiss psychologist known for his pioneering work on the cognitive development of children.
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