Protactinium

Atomic number: 91
Symbol: Pa
Most abundant neutron number: 140
Flow object: fo-51208fec587aa216
Elementary flows: 1
PubChem: https://pubchem.ncbi.nlm.nih.gov/element/91

A nuclide and an ion of an element are flow objects in their own right — Pa and each of the records below are separate substances, resolved separately and characterised separately. What holds them together is a statement on the child naming this element as its parent, which is why they are drawn under it rather than beside it.

Protactinium 91 fo-51208fec587aa216
- Nuclides 2
  - Protactinium-234 234Pa 14 flows
    
    Half life 6.70 h ± 0.05. Decay β-=100%. chemlin
  - Protactinium-234m 234Pam 12 flows
    
    Half life 1.159 m ± 0.011. Decay β-≈100%; IT=0.16±0.4%. chemlin
  30 further nuclides are known and are not in this list: they are too short-lived for an inventory to carry, and their absence is a decision rather than a gap.

Nuclide	Mass number	Half life	Decay modes	Bq/g
Protactinium-234	234	6.70 h ± 0.05	β-=100%	7.3944e+16
Protactinium-234m	234	1.159 m ± 0.011	β-≈100%; IT=0.16±0.4%	2.5648e+19

Protactinium Pa

Identity

Nuclides and ions

Nuclide detail

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