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.