About Elements: Periodic Table
Elements — Your Interactive Periodic Table & Chemistry Reference Explore the periodic table in a clean, interactive and informative way with Elements. Whether you're a student learning chemistry, a teacher looking for a
Elements — Your Interactive Periodic Table & Chemistry Reference
Explore the periodic table in a clean, interactive and informative way with Elements.
Whether you're a student learning chemistry, a teacher looking for a quick reference, or simply curious about the elements, Elements brings the periodic table, detailed element properties, electron-shell diagrams, isotopes, safety information and chemistry study notes together in one app.
🔬 Explore All 118 Elements
Browse the complete 118-element periodic table and explore elements by their position, group, period, block and category.
Use the built-in category filter to quickly focus on groups such as metals, non-metals and other element categories, or search directly by:
• Element name
• Chemical symbol
• Atomic number
Tap any element to open its detailed information.
⚛️ Detailed Element Information
Each element has a dedicated information page containing a broad range of chemical, physical and scientific data, including:
• Atomic number and atomic weight
• Mass number
• Group, period and block
• Phase and appearance
• Electron configuration
• Electron-shell distribution
• Oxidation states
• Electronegativity
• Melting and boiling points
• Density
• Electron affinity
• Atomic and molecular-scale properties
• Crystal structure
• Mechanical properties
• Electromagnetic properties
• Nuclear and stability information
• Discovery and registry information
• CAS, CID and RTECS
Where available, additional technical data provides a deeper reference for advanced chemistry and science learning.
☢️ Explore Isotopes
Go beyond the standard periodic table with the Isotopes section.
Explore recorded isotopes for individual elements with information such as:
• Mass number
• Proton and neutron counts
• Stable or radioactive status
• Natural abundance
• Half-life
• Primary decay mode
• Common isotope names where applicable
A useful resource for understanding how isotopes differ from the elements they belong to.
🧪 Electron-Shell Diagrams
Visualize the distribution of electrons across an element's shells with interactive electron-shell diagrams.
🛡️ NFPA 704 Safety Information
For elements where applicable, Elements includes NFPA 704 hazard ratings presented using the familiar safety diamond.
View ratings for:
• Health
• Flammability
• Instability
• Special hazards
🌍 Where Are the Elements Found?
Explore element abundance information across different environments, including:
• Universe
• Sun
• Earth's crust
• Ocean
• Human body
These comparisons provide a fascinating perspective on the distribution of the elements around us.
📚 Chemistry Reference & Study Notes
Elements also includes an expanding chemistry reference covering the principles behind the periodic table and periodic trends.
Topics include:
Foundations of the Periodic Table
• Development of the Periodic Table
• Mendeleev's Periodic Law
• Modern Periodic Law and the long-form table
Electronic Structure
• Electronic configuration and filling rules
• Effective nuclear charge and shielding
• Periodic table blocks
• Classification of elements
• Predicting period, group and block
Periodic Properties & Trends
• Periodicity
• Atomic radii
• Ionic radii
• Ionization energy
• Electron gain enthalpy
• Electronegativity
• Valency and oxidation states
• Melting and boiling points
• Metallic character and diagonal relationships
Chemistry of the Blocks
• s-Block elements
• p-Block elements
• d-Block transition metals
• f-Block elements
Advanced Topics
• Relativistic effects in heavy elements
• Trends in oxides, hydrides and halides
• The anomalous position of hydrogen
• Naming of superheavy elements
The reference section is designed to be useful from foundational chemistry through more advanced study.
✨ Designed for Learning & Reference
Elements combines the convenience of a quick periodic-table reference with deeper information for students and chemistry enthusiasts.
Previous Versions
Here you can find the changelog of Elements: Periodic Table since it was posted on our website on 2019-10-25 16:37:26.
The latest version is and it was updated on 2026-10-12 21:13:02. See below the changes in each version.
Elements: Periodic Table version
Updated At: 2026-09-05
Elements: Periodic Table version 2.2
Updated At: 2021-05-09
Changes: + Study Notes on Alkali & Alkaline Earth Metals.
+ Study Notes on Lanthanides & Actinides.
Elements: Periodic Table version 2.0
Updated At: 2019-04-28
Changes: + Revision Notes on important topics related to Classification of Elements & Periodic Properties.
