91Pa231.04
Element 91 · Actinoids
Protactinium
Scientific reference and industrial context.
Atomic identity
At a glance
- Atomic number
- 91
- Symbol
- Pa
- Abridged standard atomic weight
- 231.04 ± 0.01
- Period
- 7
- Group
- Actinoids row; group not assigned here
- Table family
- Actinoids
Standard atomic weights describe normal terrestrial materials; actual isotopic composition can vary.
Price reference
Reference only
Scientific reference only
This element is included for a complete scientific reference. SFM does not publish a market price or buying offer for it.
Material connections
From element to material.
Named forms and documented alloy relationships. A constituent relationship does not calculate an alloy price or establish buying eligibility.
No verified material or alloy connection has been added to this reference yet.