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.
Simply place the piece of gallium in the palm of your hand and let the warmth of your body heat do the work! The melting point of gallium is 29.76 Â°C (85.57 Â°F), so it will readily melt in your hand or in a very warm room. Expect this to take around 3-5 minutes for a coin-sized piece of metal.