P

Protactinium

Quick Reference
Formula / NotationPa
Molecular Weight231.04
CategoryElements

What is Protactinium?

Protactinium is a rare, highly toxic and radioactive actinide metal. Its name means 'parent of actinium' as it decays into actinium. It is one of the rarest and most expensive naturally occurring elements.

Formula & Notation

Pa

Properties & Characteristics

Appearance: silvery metallic. Melting point: 1568 °C. Boiling point: 4027 °C. Density: 15.37 g/cm³.

Uses & Applications

No practical commercial uses. Used in small quantities for scientific research, particularly in geochronology for uranium-thorium-protactinium dating of marine sediments.

Safety Information

Highly radioactive and toxic. Alpha emitter. Accumulates in kidneys and bones. Extreme hazard; handled only in specialist facilities.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Protactinium
Formula Pa
Molecular Weight 231.04
Category Elements

Frequently Asked Questions

Protactinium is a rare, highly toxic and radioactive actinide metal. Its name means 'parent of actinium' as it decays into actinium. It is one of the rarest and most expensive naturally occurring elements.

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