22每种元素都可以有中子数不同的同位素isotopes
如,中子数分别为1,2,3的氢的同位素氕氘氚.
假定你问的是元素最常见(丰度最高的稳定同位素)的中子数,那么
氢:0(>99.9%)
氦:2(>99.9%)
锂:4(92.5%)
铍:5100%)
硼:6(80.1%),5(19.9%)
碳:6(99%)
氮:7(99.6%)
氧:8(99.8%)
氟:10100%)
氖:10(90.5%),12(9.3%)
钠:12100%)
镁:12(79%),13(10%),14(11%)
铝:14100%)
硅:14(92.2%),15(4.7%),16(3.1%)
磷:16(100%)
硫:16(95%),18(4.2%)
氯:18(75.8%),20(24.2%)
氩:20(99.6%)
钾:20(93.3),22(6.7%)
钙:20(96.9%),24(2.1%)