Periodic Table
All 118 elements with detailsRuns locally · nothing uploaded
57–71
89–103
57–71 Lanthanides
89–103 Actinides
Tap an element for details
26Fe铁55.845
- NameIron
- Chinese name铁
- Atomic weight55.845
- Rounded56
- CategoryTransition metal
- Period / groupPeriod 4, group 8
- Blockd
- Electron configuration[Ar] 3d6 4s2
- Electrons per shell2, 8, 14, 2
Also works as:periodic table of elementsinteractive periodic tableelectron configurationatomic mass table
How to use
- 1Tap an element or search for it.
- 2Highlight a category with the buttons.
- 3Copy the configuration or atomic weight.
FAQ
Why are Cr and Cu special?
Half-filled and filled d subshells are more stable: Cr is [Ar] 3d5 4s1 and Cu is [Ar] 3d10 4s1.
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