2004/12/07 | 铁[Iron]
类别(℃〖化学〗) | 评论(0) | 阅读(21) | 发表于 13:02
The chemical element having the greatest binding energy per nucleon. The ion Fe+2 displays a diagnostic band at 1m (while Cu+2 also has a feature near 1 m = 1000 nm, its is generally not present in appreciable amounts). In the Fe+3 ion,all the bands are spin-forbidden, so one might expect weak absorption. Instead, Fe+3 has a sharp band at 440 nm.
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