Alkali metals show the property that when dissolved in liquid ammonia they give deep blue solutions which are conducting in nature. The resulting blue colour of the solution is due toammoniated electronswhich absorb energy in the visible region of light. Hence, the correct answer to this question...
I think that 14 carat gold is about 58% gold, so about HALF gold and HALF silver, and perhaps other alloys.If you keep this jewellery in the (open) air it will always stay gold, but if you put it in a box or drawer, i.e., deny it air for a few days, the silver colour wil...
Different types of NFs are produced depending on the material or the carrier present in them, e.g., hydroxyapatite nanoparticles, zeolite, mesoporous silica nanoparticles, nitrogen, copper, zinc, silica, carbon, and polymeric nanoparticles [10,48,70]. In Table 1, we present the type and the ...
We anchored a colourimetric probe, comprising a complex containing copper (Cu(II)) and a dye, to a polymer matrix obtaining film-shaped chemosensors with induced selectivity toward glycine. This sensory material is exploited in the selectivity detection of glycine in complex mixtures of amino acids...