主量子数是原子物理学中的概念，是与能层对应的量子数，表示原子轨道的量子数的其中一种（其他还包括角量子数、磁量子数和自旋量子数），用小写字母n表示。
网络释义专业释义
...这个理论模型，稳态氢原子的能量是负的, 操乃留征南将军曹仁、横野将军徐晃守江陵，并且与主量子数（principal quantum number）的平方成反比。
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... primary photometric standard 光度基准 primary quantum number 主量子数 primary radar 一次雷达 ...
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产能燃料相关词汇的中英翻译（8） ... 从优数 number， preperred 主量子数 number， principal quantum 量子数 number， quantum ...
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双语例句原声例句
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总节点数等于，主量子数减1。
And our equation for total nodes is just the principle quantum number minus 1.
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我们方程是n减去1减去，主量子数是，4，1是1，--p轨道的l是多少？,学生
l So, if we're talking about a 4 p orbital, and our equation is n minus 1 minus l, the principle quantum number is 1 4, 1 is 1 -- what is l for a p orbital?
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发现此关系式与主量子数和角量子数有关，而与核电荷数以及折合质量无关。
It is pointed out that the relation has something to do with the principal quantum number and the angular quantum number, but nothing to do with the nuclear electronic number and reduced mass.
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The other thing that we took note as is what happens as l increases, and specifically as l increases for any given the principle quantum number.
另外一个我们要注意的是,ｌ增加时如何变化，特别是对于某个给定的,主量子数ｌ变化时如何变化。
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So if we're talking about the fourth excited state, and we talk instead about principle quantum numbers, what principle quantum number corresponds to the fourth excited state of a hydrogen atom.
如果我们说的是,第四激发态，我们用,主量子数来描述，哪个主量子数对应了,氢原子的第四激发态？
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We didn't just need that n, not just the principle quantum number that we needed to discuss the energy, but we also need to talk about l and m, as we did in our clicker question up here.
我们不仅需要ｎ,不仅要这个可以,决定能量的主量子数，还需要ｍ和ｌ,就像我们做这道题这样。
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