Calculator Tools
Periodic Table
Interactive periodic table with all 118 elements. Search by name, symbol, or atomic number. View atomic weight, electron configuration, and category.
Showing all 118 elements. Click any cell for full details.
Filter by category
Carbon (C)
Atomic number 6 | Period 2 | Group 14
Basis of all known life and organic chemistry. Forms diamond, graphite, graphene, and fullerenes.
- Atomic weight
- 12.011 g/mol
- Electron configuration
- [He] 2s2 2p2
- Phase at room temperature
- Solid
- Electronegativity (Pauling)
- 2.55
- Density
- 2.267 g/cm^3
- Melting point
- 3823 K (3549.85 C)
- Boiling point
- 4098 K (3824.85 C)
- Discovered
- Antiquity
- Discovered by
- Known to ancients
Search results
118 matches
Category legend
- Alkali metal6
- Alkaline earth metal6
- Transition metal38
- Post-transition metal12
- Metalloid6
- Reactive nonmetal7
- Halogen6
- Noble gas7
- Lanthanide15
- Actinide15
How to read a cell
- Top-left: the atomic number, equal to the number of protons in the nucleus.
- Center: the IUPAC chemical symbol (one or two letters; three letters for some superheavy systematic names).
- Below: the standard atomic weight in grams per mole. Square brackets mark elements that report the mass number of their longest-lived isotope instead of a measured weight.
- Cell color: the element category (see the legend).
- Cells with no electronegativity, density, or boiling-point data are recent superheavy elements that have only been produced a handful of atoms at a time. Numeric properties for those rows are predictions, not measurements, and are reported as “Unknown” where there is no consensus value.
Common questions
- Why are lanthanides and actinides set apart? They are f-block elements. Including them in the main grid would stretch the table to 32 columns, so by convention they sit in two extra rows below the table.
- What does the atomic weight in brackets mean? A value in brackets is the mass number of the longest-lived known isotope. The element either does not occur naturally or is radioactive enough that no single value represents a stable average weight.
- Why are some properties missing? Elements 113 to 118 have only been observed as a few atoms. Their chemistry is mostly predicted from periodic trends; numeric values are extrapolations and we report them as Unknown unless there is a consensus measurement.
- Which elements are liquid at room temperature? Only bromine (Br, 35) and mercury (Hg, 80) are liquids at standard conditions; cesium, francium, gallium, and rubidium melt slightly above 293 K and become liquid in a warm room.
- How many elements are there? 118, from hydrogen to oganesson. Elements 119 and beyond have been proposed but not synthesized.
How to use
- Click any cell in the table to load that element into the detail panel below.
- Search by element name (mercury), chemical symbol (Hg, case-insensitive), or atomic number (80). Matching cells stay bright; the rest dim so you can compare across periods.
- Use the category chips to focus on alkali metals, halogens, noble gases, lanthanides, actinides, or any other group. Select All categories to reset.
- Read the detail card for atomic weight, electron configuration, density, melting and boiling points (kelvin with Celsius), year of discovery, and a one-line summary of where the element is used.
- Click Copy summary to copy the selected element's full data block to your clipboard for notes, homework, or worksheet keys.
About this tool
Periodic Table is an interactive 118-element reference that runs entirely in your browser. Each cell in the standard 18-column layout shows the atomic number, IUPAC chemical symbol, and standard atomic weight, color coded by category: alkali metals, alkaline earth metals, transition metals, post-transition metals, metalloids, reactive nonmetals, halogens, noble gases, lanthanides, and actinides. Click any element to open a detail panel with its electron configuration in noble-gas shorthand, Pauling electronegativity, density at standard conditions, melting and boiling points in kelvin with the Celsius equivalent, year of discovery, the chemist or team that isolated it, and a short summary of where the element is used in industry, biology, and everyday life. Standard atomic weights follow the IUPAC 2021 revision; radioactive elements without a stable isotope (technetium, promethium, polonium through oganesson, and the synthetic transactinides) report the mass number of the longest-lived known isotope in square brackets so you can spot them at a glance. The search box accepts any of an element name, a chemical symbol, or an atomic number, so typing Fe, iron, or 26 all jump to the same cell. The category filter dims unmatched elements without hiding them so trends across periods stay visible while you focus on, for example, halogens or the f-block. The lanthanide and actinide series sit in two extra rows below the main table, the standard convention used in chemistry textbooks and the IUPAC layout. A Copy summary button copies the selected element's full data block to your clipboard as plain text for homework, lab notebooks, or worksheet keys. Useful for chemistry students, science teachers preparing handouts, lab technicians, writers fact-checking science copy, quiz makers, museum exhibit designers, and anyone who needs a quick element lookup without registering for a chemistry app. Nothing is uploaded; the data is bundled at build time so the table works offline once the page is loaded.
Free to use. Works in your browser. No signup, no login.
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