Examlex
How many different structures (including structural and geometric isomers) exist for C2H2Cl2?
Appearance
The way that someone or something looks to others, encompassing aspects of physical presentation and style.
Cognitive Development
The study of how thinking, problem solving, and understanding of the world evolve from infancy through adulthood, influenced by genetics, experience, and education.
Preoperational
The Preoperational stage is the second stage in Piaget's theory of cognitive development, occurring from ages 2 to 7, where children begin to engage in symbolic play but lack the ability to perform operations or see things from the perspective of others.
Words
Symbols or combinations of letters that represent or convey meaning in spoken or written language.
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