Carbon-14 Dating and the Nitrogen-14 (7-14) Story | 碳-14测年与氮-14（7-14）的故事

📚 Carbon-14 Dating and the Nitrogen-14 (7-14) Story | 碳-14测年与氮-14（7-14）的故事

The code “714” might seem mysterious, but in atomic science it can be read as “7-14”: the atomic number 7 and mass number 14 of nitrogen-14. This isotope is the stable product formed when carbon-14 undergoes beta decay. Understanding this transformation is a key part of the Edexcel IGCSE Science syllabus, linking atomic structure, radioactivity, half-life and real-world dating.

“714”这个代码看似神秘，但在原子科学中它可以解读为”7-14″：氮-14的原子序数7和质量数14。这种同位素是碳-14发生β衰变时形成的稳定产物。理解这一转变是爱德思IGCSE科学大纲的核心内容，它将原子结构、放射性、半衰期和实际测年联系起来。

1. What Does “7-14” Mean in Science? | 科学中的”7-14″代表什么？

Every atom is built from protons, neutrons and electrons. The atomic number Z is the number of protons in the nucleus. The mass number A is the total number of protons and neutrons. For nitrogen, Z = 7, which identifies it as the element nitrogen. If the atom also has 7 neutrons, then A = 14, so the nucleus is nitrogen-14. Its standard symbol is written with the mass number as a superscript and the atomic number as a subscript: ¹⁴₇N.

每个原子都由质子、中子和电子构成。原子序数Z是原子核中的质子数，质量数A是质子数与中子数之和。对于氮而言，Z=7，这确定了它是氮元素。如果该原子还有7个中子，那么A=14，因此这个原子核就是氮-14。它的

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