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nitrogen
氮
化学元素,元素符号N,原子序数7,原子量14.007,属周期系ⅤA族。
Astronomy
全称:nitrogen。缩写:N
氮
Chemistry
>无机化学>无机化学基本概念与无机化合物>释义
nitrogen
氮
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allowed orbit
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allowed transition
allowed β transition
alloxazine
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