Protactinium atom & ion lab
Change the electron count of Protactinium and inspect its charge, shells and reviewed atomic properties.
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Scientific learning path
- 01UnderstandLive
- 02ExploreLive
- 03ExperimentLive
- 04ObserveLive
- 05ExplainLive
- 06ApplyLive
- 07TestLive
Explanation mode
Core label represents the fixed nuclear charge; individual neutrons are not inferred from standard atomic weight.
Reviewed atomic properties
Unavailable measurements remain explicitly unavailable.
First ionization energy568 kJ mol⁻¹
Covalent radius200 pm
Electronegativity1.5 Pauling
Description of this simulation
Protactinium is neutral here: 91 protons are balanced by 91 electrons across shells 2, 8, 18, 32, 21, 8, 2.
Quick test · 3 questions
Pa
Protactinium
- Protons
- 91
- Electrons
- 91
- Shells
- 2 · 8 · 18 · 32 · 21 · 8 · 2
- Configuration
- [Rn] 5f2 6d1 7s2
- Common oxidation states
- 4, 5
- Phase near room conditions
- solid
What this model shows — and what it simplifies
Educational ModelThe nuclear charge stays fixed at 91 protons, which is what defines Protactinium.
Where do we see this in real life?
The electron count and measured properties of Protactinium 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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