元素周期表
UpBox优盒工具箱，在线元素周期表，收录 118 种化学元素，按碱金属、过渡金属、稀有气体等分类着色，支持符号、中文名、序号检索与元素详情查看。
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元素周期表Periodic table
表格较宽，左右滑动可查看全部 18 列The table is wide; swipe horizontally to see all 18 columns
工具介绍
元素周期表把 118 种元素按周期和族排进 18 列 7 行，镧系和锕系单独抽出两行，避免主表被拉得过宽。每一格显示原子序数、元素符号和中文名，颜色代表元素分类，扫一眼就能看出金属、非金属和稀有气体的分布。 The periodic table arranges all 118 elements into 18 columns and 7 rows, with lanthanides and actinides pulled out into two rows so the main grid stays readable. Each cell carries the atomic number, symbol and Chinese name, coloured by category.
主要功能上，十类元素各有配色，图例里标出类别与数量，点图例可以直接筛选，再点一次取消；第 6、7 周期第 3 族留了「57-71」「89-103」两个占位格，点一下就跳到镧系或锕系首元素；搜索框支持元素符号、中文名和原子序数三种输入，输入时未匹配的元素自动淡出；点任意元素，下方给出相对原子质量、分类、周期与族。 Ten categories each have a colour, and the legend doubles as a filter: click a category to isolate it, click again to clear. The sixth and seventh periods carry 57-71 and 89-103 placeholder cells that jump to the first lanthanide or actinide. Search accepts symbols, Chinese names and atomic numbers, dimming everything else, and clicking an element shows its mass, category, period and group.
优势亮点在于一整张表都在本地：不依赖外部图片，不会被网络或图床拖慢；搜索与筛选即时生效，选过的分类会记在本机；打印输出整张彩色表格，可以贴在书桌前，也可以当作课堂投屏的底图。 The whole table is local, so it never waits on an external image host. Search and filtering respond instantly, the chosen category is remembered on this device, and printing outputs the full coloured table for a desk or a classroom projector.
适用人群与场景：初三化学刚接触元素符号的学生；高一预习原子结构与周期律；老师上课投屏讲解族的规律；以及需要快速查原子量与分类的家长和自学者。 Useful for ninth graders meeting element symbols, first-year high school students previewing periodic trends, teachers projecting group patterns, and anyone checking masses or categories quickly.
需要说明的边界：相对原子质量取常见值，放射性元素用最常见同位素的质量数；104 号以后的中文名多为生僻字，部分系统字体缺字形，网格内只显示符号，英文名在详情中给出。 Limits: masses use common values, and radioactive elements list the mass number of their common isotope. Chinese names above 103 use rare characters that some fonts cannot render, so the grid shows symbols only and the detail panel gives the English name.
使用方式：在搜索框输入符号、中文名或序号即可定位；想集中看某一类就点图例筛选，讲卤素或稀有气体时特别顺；点格子看详情，打印出来的整张表可以直接当挂图。 How to use it: type a symbol, Chinese name or atomic number to locate an element, click a legend chip to isolate a category when teaching halogens or noble gases, then click a cell for details. The printed table works as a wall chart.
- 118 种元素，18 列 7 行All 118 elements in 18 columns and 7 rows
- 镧系 / 锕系独立两行 + 占位格Separate lanthanide and actinide rows with placeholders
- 十类配色图例，可点击筛选Ten-category legend that filters on click
- 符号 / 中文名 / 序号检索Search by symbol, name or atomic number
- 点选查看质量、周期与族Click for mass, period and group
- 打印输出完整彩色表格Print the full coloured table
使用说明
- 在搜索框输入 Fe、铁或 26，其余元素会淡出。Type Fe, iron or 26 in the search box and the rest fades out.
- 输入后按回车，直接跳到第一个匹配的元素详情。Press Enter to jump to the first match.
- 点任意格子，下方详情会更新质量、分类、周期和族。Click a cell and the detail panel updates mass, category, period and group.
- 对照图例的颜色，快速找出碱金属、卤素或稀有气体的位置。Use the legend colours to locate alkali metals, halogens or noble gases.