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本文列举了两个简单的例子,在这两个例子中涉及到原子的数量级计算.我们希望这两个例子将有助于教师们提高学生对原子的几何特性方面的理解.例一,在生物细胞中.遗传信息是由染色体中的 DNA(脱氧核糖核酸)分子所携带的.人类的所有遗传信息则都是由细胞核中的46条染色体所携带.细胞核的直径为3×10~(-6)米至10×10~(-6)米.46条染色体估计包含总数为3
This article lists two simple examples that involve the calculation of the order of magnitude of an atom. We hope that these two examples will help teachers improve students’ understanding of the geometry of atoms. Example 1 In the cell, genetic information is carried by DNA (deoxyribonucleic acid) molecules in the chromosome. All human genetic information is carried by 46 chromosomes in the nucleus. The diameter of the nucleus is 3×10~(-6). ) Rice to 10×10-6 meters. 46 chromosomes are estimated to contain a total of 3