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Hace 8 horas · Platinum finds use in jewellery, usually as a 90–95% alloy, due to its inertness. It is used for this purpose for its prestige and inherent bullion value. Jewellery trade publications advise jewellers to present minute surface scratches (which they term patina ) as a desirable feature in an attempt to enhance value of platinum products.
- silvery white
- group 10
- 78
Hace 1 día · Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23 Na. The free metal does not occur in nature and must be prepared from compounds. Sodium is the sixth most abundant element in the Earth's crust and exists in numerous minerals such as feldspars, sodalite, and halite (NaCl).
- silvery white metallic
- group 1: hydrogen and alkali metals
- 11
- period 3
Hace 8 horas · The Z-Scheme system consisting of rhodium-loaded strontium titanate with Ru as co-catalyst and bismuth vanadate showed the highest photocatalytic performance for complete splitting in visible light in the availability of iron redox couple with a quantum yield of 3.9–4.2% observed at wavelength 420 nm and a solar energy conversion efficacy of about 0.1%.
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