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化学元素符号应用正体排印,首字母大写,在符号后不加圆点。核素的核子数(质量数)标注在元素符号左上角,如14N,60Co,不写成14氮或N14,60钴或Co60。分子中核素的原子数标注在核素符号的右下角,如14N2。质子数(原子序数)标注在元素符号的左下角,如82Pb,26Fe。离子价和表明阴、阳离子的符
The chemical element symbol is printed in the form of a letter with the initials capitalized, without dots after the symbol. Nuclide nuclei number (mass) marked in the upper left corner of the element symbol, such as 14N, 60Co, not written as 14 nitrogen or N14,60 cobalt or Co60. The number of atoms in the molecule labeled in the lower right corner of the nuclide symbol, such as 14N2. The number of protons (atomic number) is marked in the lower left corner of the element symbol, such as 82Pb, 26Fe. Ion price and that the Yin and Yang Fu symbol