Dual coding theory has been applied to many cognitive phenomena including: mnemonics, problem-solving, concept learning and language. Dual coding theory accounts for the significance of spatial abilities in theories of intelligence (e.g., Guilford).
Properties. 1  Atomic Symbol: Cr. 2  Atomic Number: 24. 3  Atomic Mass: 51.996g/mol1.  Element Category: Transition 1  Metal. Density: 7.19g/cm3 at 20Â° C. Melting Point: 3465Â°F 1  (1907Â°C) Boiling Point: 4840Â°F (2671Â° C) Mohâs Hardness: 5.5.
Alloy additions also suppress (lower) the melting range. Pure iron (Fe) has a fixed melting point of 1535Â°C, chromium (Cr) 1890Â°C and nickel (Ni) 1453Â°C compared to a range of 1400-1450 Â°C for type 304 stainless steel.