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.
Atomic Number: 54. Atomic Weight: 131.293. Melting Point: 161.36 K (-111.79Â°C or -169.22Â°F) Boiling Point: 165.03 K (-108.12Â°C or -162.62Â°F) Density: 0.005887 grams per cubic centimeter. Phase at Room Temperature: Gas. Element Classification: Non-metal. Period Number: 5 Group Number: 18 Group Name: Noble Gas.