â George Mandler has described the origins of cognitive psychology in, Ulric Neisser is credited with formally having coined the term cognitive(2002). psychology (in terms of the current understanding of cognitive psychology) in his book Cognitive Psychology, published in 1967.
The melting point of fluorine is -219 Â°C (-363 Â°F). The boiling point of fluorine is -188 Â°C (-307 Â°F).
Fluorine is a nonmetal that belongs to the family of elements called halogens. The symbol of fluorine is F, and its atomic weight is 18.9984032 atomic mass units or grams per mole.