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- Protactinium - Wikipedia
Protactinium is a chemical element; it has symbol Pa and atomic number 91 It is a dense, radioactive, silvery-gray actinide metal which readily reacts with oxygen, water vapor, and inorganic acids
- Protactinium | Radioactive, Decay, Isotopes | Britannica
Protactinium (Pa), radioactive chemical element of the actinoid series of the periodic table, rarer than radium; its atomic number is 91
- Protactinium - Element information, properties and uses | Periodic Table
Element Protactinium (Pa), Group 20, Atomic Number 91, f-block, Mass 231 036 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
- Protactinium | Pa | CID 23945 - PubChem
Protactinium atom is an actinoid atom and a f-block element atom Protactinium has been reported in Paris polyphylla var chinensis with data available A radioactive element of the actinide group of metals It has the atomic symbol Pa, atomic number 91, and atomic weight 231 It decays by alpha-emission Pa
- Protactinium (Pa) Element: History, Properties, Toxicity, Hazard
Protactinium is a radioactive element of the actinide family It has a silver-grey color and is thick Pa has an atomic number of 91 It has a melting point of 1568 °C (2854 °F) and a boiling point of 4027 °C ( 7280 °F) Protactinium has qualities that are midway between thorium and uranium
- Periodic Table of Elements: Los Alamos National Laboratory
Protactinium is one of the rarest and most expensive naturally occurring elements The average concentrations of protactinium in the Earth's crust is typically on the order of a few parts per trillion, but may reach up to a few parts per million in some uraninite ore deposits
- Protactinium - New World Encyclopedia
Protactinium (chemical symbol Pa, atomic number 91) is a member of the actinide series of chemical elements It is a toxic, highly radioactive material, of interest mainly for scientific research
- Element: Protactinium — Periodic table
Protactinium is a chemical element; it has symbol Pa and atomic number 91 It is a dense, radioactive, silvery-gray actinide metal which readily reacts with oxygen, water vapor, and inorganic acids
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