Periodic Table
Explore all 118 chemical elements with our free interactive periodic table. Click any element to instantly view its atomic mass, electron configuration, electronegativity, melting and boiling points, density, oxidation states, and discovery details. Filter elements by category or search by name, symbol, or atomic number — no signup required.
Click any element to see its full properties — atomic mass, electron configuration, melting point, electronegativity, and more. Filter by category or search by name, symbol, or atomic number. All data loads locally in your browser.
Click any element to view its full properties. Filter by category using the legend above.
Why Use Our Periodic Table?
Fast, accurate, and comprehensive element reference
Instant Element Lookup
Click any element on the periodic table to instantly view its full properties — atomic mass, electron configuration, electronegativity, melting point, boiling point, density, oxidation states, and discovery details. All data loads in your browser with zero wait time.
Secure Periodic Table Online
Our interactive periodic table runs entirely in your browser. No data is sent to any server, no account is required, and your searches are completely private. Use the periodic table online from any device with 100% privacy.
Periodic Table - No Installation
Access the full interactive periodic table directly in any modern browser with no downloads, plugins, or software required. Works on desktop, tablet, and mobile — instantly and for free.
Category Filter and Search
Filter all 118 elements by category — alkali metals, transition metals, noble gases, lanthanides, and more — with a single click. Search by element name, symbol, or atomic number to find any element instantly.
Common Use Cases for Periodic Table
Practical applications for the interactive periodic table
Chemistry Students and Homework
Look up electron configurations, oxidation states, and electronegativity values instantly while studying. Our periodic table provides all the data needed for chemistry assignments without switching between multiple reference books.
Science Teachers and Classrooms
Use the interactive periodic table as a classroom reference tool. The category filter lets teachers highlight specific element groups — transition metals, halogens, noble gases — to illustrate periodic trends visually.
University Chemistry and Physics
Access precise atomic masses, melting and boiling points, and electron configurations for university-level coursework. The periodic table covers all 118 confirmed elements including synthetic transactinides.
Chemical Equation Balancing
Reference element properties while balancing chemical equations. Look up oxidation states and electron configurations to understand reaction mechanisms and predict chemical behavior.
Materials Science and Engineering
Look up density, melting point, and crystal structure data for material selection in engineering projects. Filter by element category to compare properties across metal groups.
Science Quiz and Competition Prep
Use the search and filter features to quiz yourself on element symbols, atomic numbers, and categories. The interactive periodic table is an effective study tool for science olympiad and chemistry competitions.
Understanding the Periodic Table
Learn how the periodic table is organized and how to read element data
What is the Periodic Table?
The periodic table is a systematic arrangement of all known chemical elements ordered by increasing atomic number (number of protons). Developed by Dmitri Mendeleev in 1869, the periodic table organizes elements into periods (horizontal rows) and groups (vertical columns) based on their electron configurations and recurring chemical properties. Elements in the same group share similar chemical behavior because they have the same number of valence electrons. Our interactive periodic table covers all 118 confirmed elements, from hydrogen (Z=1) to oganesson (Z=118), with complete property data for each.
How to Use Our Interactive Periodic Table
- Click Any Element: Click on any element cell in the periodic table to open its full detail panel. The panel shows atomic mass, electron configuration, electronegativity, melting and boiling points, density, oxidation states, and discovery information.
- Search by Name, Symbol, or Number:Use the search bar to find any element instantly. Type the element name (e.g., "carbon"), symbol (e.g., "C"), or atomic number (e.g., "6") and matching elements are highlighted immediately.
- Filter by Category: Click any category in the legend to highlight all elements of that type — alkali metals, transition metals, noble gases, lanthanides, and more. Click the same category again to clear the filter.
Element Categories in the Periodic Table
- Alkali Metals (Group 1): Highly reactive metals that react vigorously with water. Include lithium, sodium, and potassium.
- Transition Metals (Groups 3–12): The largest block of elements. Include iron, copper, gold, and silver. Known for variable oxidation states and colored compounds.
- Noble Gases (Group 18): Colorless, odorless, and largely inert gases. Include helium, neon, and argon. Full valence shells make them unreactive.
- Lanthanides and Actinides: The two rows below the main table. Lanthanides are rare earth metals; actinides include uranium and plutonium and are mostly radioactive.
How to Read Element Properties
Each element cell in the periodic table shows the atomic number (number of protons), element symbol (1–2 letter abbreviation), and element name. The atomic mass shown is the standard atomic weight in unified atomic mass units (u or Da), which is the weighted average of all naturally occurring isotopes. Electronegativity is measured on the Pauling scale — higher values indicate stronger attraction for electrons in a bond. Melting and boiling points are given in Kelvin (K) with Celsius equivalents. For synthetic elements with no stable isotopes, the atomic mass shown is the mass number of the most stable known isotope.
Frequently Asked Questions About Periodic Table
Common questions about the periodic table and element properties
An interactive periodic table is a digital version of the standard chemistry reference that lets you click on any element to view its full properties — atomic number, atomic mass, electron configuration, electronegativity, melting point, boiling point, density, oxidation states, and discovery details. Our periodic table covers all 118 confirmed elements and runs entirely in your browser with no signup required.
The periodic table currently contains 118 confirmed elements, from hydrogen (atomic number 1) to oganesson (atomic number 118). Elements 1–94 occur naturally on Earth, while elements 95–118 are synthetic and have been produced in particle accelerators. Our interactive periodic table includes all 118 elements with complete property data.
The atomic number is the number of protons in the nucleus of an atom. It uniquely identifies each element — no two elements have the same atomic number. The atomic number also determines the element's position in the periodic table and its chemical properties. For example, carbon always has 6 protons, so its atomic number is always 6.
Electronegativity is a measure of how strongly an atom attracts electrons in a chemical bond, measured on the Pauling scale (0–4). Fluorine has the highest electronegativity (3.98) and francium the lowest (0.7). The difference in electronegativity between two bonded atoms determines whether the bond is ionic, polar covalent, or nonpolar covalent — which affects a molecule's reactivity and physical properties.
Lanthanides (elements 57–71) and actinides (elements 89–103) are the two rows displayed below the main periodic table. They are placed separately because including them in the main grid would make the table too wide. Lanthanides are rare earth metals used in magnets, lasers, and electronics. Actinides include uranium and plutonium and are mostly radioactive, with applications in nuclear energy and medicine.
Yes. All element data in our interactive periodic table is based on IUPAC (International Union of Pure and Applied Chemistry) standard atomic weights and peer-reviewed reference sources. Atomic masses reflect the 2021 IUPAC recommendations. For synthetic elements, the mass number of the most stable known isotope is shown.
Yes — our interactive periodic table is 100% free with no signup, no account, and no usage limits. Search, filter, and explore all 118 elements as many times as you need, completely free forever.
Yes. The interactive periodic table is fully responsive. On mobile, the table scrolls horizontally and element cells show the atomic number and symbol. Tap any element to view its full property panel. The search and category filter features work on all screen sizes.
The atomic number is the count of protons in the nucleus and is always a whole number that uniquely identifies the element. The atomic mass (or atomic weight) is the average mass of all naturally occurring isotopes of the element, weighted by their natural abundance, expressed in unified atomic mass units (u). For example, carbon has atomic number 6 but atomic mass 12.011 because it has two stable isotopes (C-12 and C-13).