Inside an atom
Carbon-12 has 6 protons and 6 neutrons; changing the proton count would create a different element.
从这里开始
Carbon-12 has 6 protons and 6 neutrons; changing the proton count would create a different element.
连接概念
Carbon-12 has 6 protons and 6 neutrons; changing the proton count would create a different element.
The quantum numbers label allowed electron states; they are not little planetary coordinates around the nucleus.
Sodium has 11 electrons; its outer 3s electron helps explain why sodium readily forms Na+.
具体检查点
Start with the nucleus, then move outward. Protons identify the element; electrons occupy quantum states rather than miniature planetary tracks. Electron configuration is the bridge from atomic structure to chemistry.
继续深入
参考资料
IUPAC · CIAAW 2024 · NIST · BIPM SI Brochure