Science / Elements
Interactive Periodic Table: Properties and States
For students and teachers: explore the 118 elements, compare properties with a colour scale, inspect electron configurations and print a category table for revision.
Interactive Periodic Table: Properties and States: Find an element by name, symbol or number, then compare its properties with other elements using category colours or a colour scale. Select an element to read its full details, explore how temperature affects its state, or print a table for revision. Runs 100% locally in your browser with zero server file uploads.
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For students and teachers: compare element properties, inspect electron configurations and explore changes of state. Element names follow the English PubChem data.
118 matching elements
Tab to an element, use arrow keys to move and Enter to select. The state labels assume standard pressure and simplify behaviour using melting and boiling points. Missing or inconsistent points give an unknown state; phase transitions, sublimation and pressure effects need more detailed data.
Carbon
At 298.15 K: Solid- Atomic number
- 6
- Symbol
- C
- Atomic mass (u)
- 12.011
- Electron configuration
- [He]2s2 2p2
- Electronegativity (Pauling)
- 2.55
- Atomic radius (pm)
- 170
- Ionisation energy (eV)
- 11.260
- Electron affinity (eV)
- 1.263
- Oxidation states
- +4, +2, -4
- Standard state
- Solid
- Melting point (K)
- 3823
- Boiling point (K)
- 4098
- Density (g/cm³)
- 2.2670
- Group block
- Nonmetal
- Year discovered
- Ancient
- CPK colour (hex)
- 909090
PubChem values are retained as supplied. Atomic radius is the van der Waals radius. Standard atomic weights depend on isotopic composition; some IUPAC weights are intervals, and elements without a standard atomic weight use a representative isotope mass number. These displayed atomic masses are not a replacement for the IUPAC standard atomic weights table. PubChem (NIH/NCBI) · IUPAC atomic weights note
Periodic table · category colours
PubChem (NIH/NCBI), public domain. Atomic masses are shown as supplied; see IUPAC for standard atomic weights.
Element data and units
Explore the properties of 118 elements using the public-domain PubChem Periodic Table of Elements from NIH/NCBI: https://pubchem.ncbi.nlm.nih.gov/periodic-table/ . For the full atomic mass, select an element or print the table. Atomic mass is shown in u, van der Waals atomic radius in pm, ionisation energy and electron affinity in eV, melting and boiling points in K, and density in g/cm³. Electronegativity uses the Pauling scale, which has no unit.
Standard atomic weights and state model
For standard atomic weights and an explanation of isotope variation, see IUPAC: https://iupac.org/what-we-do/periodic-table-of-elements/ . The temperature labels are a simplified guide at standard pressure: solid below the melting point, liquid between melting and boiling, and gas at or above boiling. Use more detailed references when pressure or other changes of state matter.
How to use it
- Search by English name, symbol or atomic number, then select an element.
- Choose category colours or a property heat map and read the legend.
- Change the temperature to explore simplified states at standard pressure, or print the category table.
Privacy & limitations
Element data is bundled with the page. Searches and temperature settings stay in your browser.
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Frequently asked questions
Why do some values show a dash?
A dash means PubChem does not give a value for that property. Elements discovered in ancient times show Ancient in the details and grey on the year colour scale, because there is no single discovery year to compare.
Is the temperature state always exact?
No. Use it to explore when an element might melt or boil at standard pressure. Real behaviour can differ with pressure, and some elements can change directly between solid and gas. An unknown label means the available melting and boiling points are missing or inconsistent.
Are these standard atomic weights?
The masses come from PubChem. Cells round them to at most three decimal places; the details and printed table show the full values. IUPAC standard atomic weights may be ranges because isotope proportions vary, and some radioactive elements have no standard atomic weight. Check IUPAC when precision matters.
Can I use it on a phone?
Yes. Scroll the table horizontally, search for an element and tap it to open the details. Element names are shown in English.
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