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).
Tungsten's melting point of 3422 Â°C is the highest of all metals and second only to carbon (3550 Â°C) among the elements. This is why tungsten is used in rocket nozzles and reactor linings. There are refractory ceramics and alloys that have higher melting points, notably $\ce{Ta4HfC5}$ with a melting point of 4215 Â°C, hafnium carbide at 3900 Â°C and tantalum carbide at 3800 Â°C. Carbon cannot be used to hold molten tungsten because they will react to form tungsten carbide.