钕是最活泼的稀土�属之一,钕玻璃可代替红宝石做激光材料亦可做护目镜。钕在元素�期表中的部分信息如图1所示,其原子结构示意图如图2所示,则下列 Template


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tomski钕是最活泼的稀土�属之一,钕玻璃可代替红宝石做激光材料亦可做护目镜。钕在元素�期表中的部分信息如图1所示,其原子结构示意图如图2所示,则下列 coloring