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).
Hydrofluoric Acid. FLUORINE is a poisonous pale yellow gaseous element found in Group VIIb (i.e. the Halogen Group of elements) of the periodic table. Fluorine is the most reactive element known. It reacts violently with water liberating oxygen and forming hydrofluoric acid (HF).