2006-12-04 13:38:05 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
It depends on which frequencies of light are absorbed and which are reflected. This is determined by the molecular structure of the metals. Copper is another example.
2006-12-04 13:50:38 · answer #1 · answered by RG 4 · 0⤊ 0⤋
When you get to the position of gold and mercury in the periodic table, there are deficiencies in the shielding of inner (K-shell) electrons from the full intensity of the +79 charge of the Au nucleus and the +80 of Hg. As a result, in the Newtonian view of things, electrons in the K shell must orbit very fast to keep from "falling into the nucleus." In fact, in mercury and gold, the calculation is that the electrons must travel at about 1/10 the speed of light. At such "relativistic" speeds, unusual behavior based on relativity result, like yellow gold and liquid mercury.
2006-12-04 21:51:11 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋
They are different elements. Silver, Ag, and Gold, Au. Pigmentation? I have no clue. They can't be simplifed more, so I have no clue as to what gives them their color.
2006-12-04 21:40:30 · answer #3 · answered by Puddles 2 · 0⤊ 0⤋