Educational Tools
Science & ResearchPeriodic Table Explorer
Explore all 118 chemical elements with electron configurations, electronegativity, melting/boiling points, density, and discovery information. Filter by category and search by name, symbol, or atomic number.
Search & Filter
Periodic Table
*
*
Ln
An
Element Details
Click any element on the table to view details
Category Legend
Related Tools
About Periodic Table Explorer
How It Works
- Click any element cell to view detailed information in the panel on the right
- Use the search bar to find elements by name, chemical symbol, or atomic number
- Filter elements by category using the color-coded legend buttons
- View electron configuration, electronegativity, melting/boiling points, and more
- All 118 confirmed elements from Hydrogen (1) to Oganesson (118) are included
Common Use Cases
- Chemistry students studying element properties and periodic trends
- Educators preparing lessons on atomic structure and chemical groups
- Quick reference for element discovery dates and discoverers
- Comparing electronegativity, density, and melting points across elements
- Understanding element categories: alkali metals, noble gases, lanthanides, etc.
Frequently Asked Questions
How many elements are on the periodic table?
The periodic table currently contains 118 confirmed chemical elements, from Hydrogen (atomic number 1) to Oganesson (atomic number 118). All 118 are included in this tool.
How do I find a specific element?
Use the search bar at the top to search by element name (e.g., 'Carbon'), chemical symbol (e.g., 'C'), or atomic number (e.g., '6'). Matching elements are highlighted on the table and non-matching ones are dimmed.
What information is shown for each element?
Clicking an element reveals its atomic number, symbol, name, atomic mass, category, group, period, electronegativity, electron configuration, melting point, boiling point, density, discoverer, year of discovery, and a brief summary.
What are the element categories?
Elements are grouped into 10 categories: Alkali Metal, Alkaline Earth Metal, Transition Metal, Post-Transition Metal, Metalloid, Nonmetal, Noble Gas, Lanthanide, Actinide, and Unknown. Each category has a distinct color on the table.
How do I filter elements by category?
Click any category button in the legend at the bottom of the table. Only elements in that category will remain fully visible; others are dimmed. Click the same button again or 'All Categories' to reset the filter.
What is electron configuration?
Electron configuration describes the distribution of electrons in an atom's orbitals (s, p, d, f). It is shown using noble gas shorthand notation, e.g., [He] 2s² 2p² for Carbon.
What is electronegativity?
Electronegativity is a measure of an atom's tendency to attract shared electrons in a chemical bond. It is measured on the Pauling scale. Fluorine has the highest electronegativity (3.98) and Francium has the lowest (0.7).
Why are lanthanides and actinides shown separately?
Lanthanides (elements 57–71) and actinides (elements 89–103) are placed in separate rows at the bottom of the standard periodic table to keep the table compact. In their actual positions they would belong to periods 6 and 7 respectively.
What do melting and boiling points represent?
Melting and boiling points are the temperatures at which an element transitions between solid/liquid and liquid/gas states under standard pressure. They are given in Kelvin (K) in this tool. Tungsten has the highest melting point (3695 K).
Which elements were known in ancient times?
Several elements have been known since antiquity and have no single credited discoverer: Carbon, Sulfur, Iron, Copper, Silver, Gold, Mercury, Tin, and Lead. These are marked as 'Ancient' in the discovery information.
What are synthetic elements?
Synthetic elements are those not found naturally on Earth and must be produced in a laboratory via nuclear reactions. All elements with atomic number 95 (Americium) and above are synthetic, along with Technetium (43) and Promethium (61).
What is the heaviest naturally occurring element?
Uranium (atomic number 92) is the heaviest element found in significant quantities in nature. Trace amounts of Neptunium (93) and Plutonium (94) also occur naturally from radioactive decay.