| 单词 | lanthanide contraction |
| 释义 | lanthanide contraction [`lan·thǝ´nīd kǝn´trak·shǝn] ATOMIC PHYSICS A phenomenon encountered in the rare-earth elements; the radii of the atoms of the members of the series decrease slightly as the atomic numbers increase; starting with element 58 in the periodic table, the balancing electron fills in an inner incomplete 4f shell as the charge on the nucleus increases. |
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