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 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.