Periodic Table
An interactive periodic table with atomic mass, electron configuration, category and more for all 118 elements. Works offline.
No uploads
57–71
89–103
6C12.011
- Name
- Carbon
- Atomic number
- 6
- Atomic mass
- 12.011 u
- Category
- Reactive nonmetal
- Period / group
- 2 / 14
- Protons · neutrons (approx.)
- 6 · 6
- Electron configuration
- [He] 2s2 2p2
- Outer-shell electrons
- 4
How to use Periodic Table
- 1Open Periodic Table. It runs in your browser, no sign-up.
- 2Type or paste your input.
- 3Copy or download the result.
Questions
Where does the data come from?
Standard atomic weights (IUPAC, rounded) and ground-state electron configurations, built into the page so it works offline.
Why are some masses whole numbers?
Elements with no stable isotopes show the mass number of their longest-lived isotope.
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