Periodic table

The Periodic Table of Chemical Elements is a concise and aesthetically pleasing periodic table lookup tool that fully displays all 118 chemical elements. The extended version displays all elements in a standard periodic table grid layout of 18 columns x 10 rows. Each cell contains the atomic number and element symbol, and different colors are used to categorize elements for easy navigation. Core Functions: 🔬 Click Element—Clicking any element cell will pop up a details overlay displaying information such as atomic weight, element classification, electron configuration, state of matter, melting point, and boiling point. 🎨 Classification Legend—Clicking the legend button highlights or hides elements in specific categories (alkali metals, transition metals, nonmetals, etc.) for easy learning and comparison. 🔄 Show All—One-click restoration of all element displays and clearing of filter status. 📱 Dual Modes—Supports pop-up mode and independent tab mode. Clicking the "New Tab" button allows viewing the full page. Data covers elements with atomic numbers 1-118, including key information such as Chinese name, English symbol, atomic weight, electron configuration, state of matter, melting and boiling points. The extension is completely free, does not request any permissions, and does not collect any user data.