quantum number

例句：

1. 1.In quantum mechanics, the eigenvalues of a system are determined by its quantum numbers.
   在量子力学中，一个系统的本征值由它的量子数决定。
2. 2.The quantum number of an element is the smallest positive integer that divides the atomic number into two parts.
   元素的量子数是原子序数分成两部分的最小正整数。
3. 3. The quantum number for protons in a nucleus is always odd, while those for neutrons are always even.
   核子中质子的量子数总是奇数，而中子的量子数总是偶数。