Francium atom & ion lab
Change the electron count of Francium and inspect its charge, shells and reviewed atomic properties.
Scientific learning path
- 01UnderstandLive
- 02ExploreLive
- 03ExperimentLive
- 04ObserveLive
- 05ExplainLive
- 06ApplyLive
- 07TestLive
Core label represents the fixed nuclear charge; individual neutrons are not inferred from standard atomic weight.
Reviewed atomic properties
Unavailable measurements remain explicitly unavailable.
No stable isotope; the longest-lived, Fr-223, has a half-life of 22 minutes. Melting and boiling points are extrapolated, not measured. Its first ionization energy is HIGHER than caesium’s: relativistic contraction of the 7s orbital pulls the outer electron closer in, so caesium, not francium, is the element easiest to ionize.
Description of this simulation
Francium is neutral here: 87 protons are balanced by 87 electrons across shells 2, 8, 18, 32, 18, 8, 1.
Quick test · 3 questions
Fr
Francium
- Protons
- 87
- Electrons
- 87
- Shells
- 2 · 8 · 18 · 32 · 18 · 8 · 1
- Configuration
- [Rn] 7s1
- Common oxidation states
- 1
- Phase near room conditions
- solid
What this model shows — and what it simplifies
Educational ModelThe nuclear charge stays fixed at 87 protons, which is what defines Francium.
Where do we see this in real life?
The electron count and measured properties of Francium help determine how it bonds, reacts and is identified in chemical materials.
Explain this result
Scientific review record
Building- Module version
- v1 bundled
- Published
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- Last reviewed
- Not yet verified
- Academic level
- Undergraduate
- Reviewer
- Not publicly assigned
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