Protactinium - Wikipedia
网页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 - Element information, properties and uses
网页Protactinium is a silvery, radioactive metal that decays by beta-emission. It is produced by the radioactive decay of uranium and has no known biological role. Learn more about its history, discovery, isotopes, and atomic data.
Protactinium | Radioactive, Decay, Isotopes | Britannica
网页Protactinium is a rare actinoid element that decays to actinium-227 with a half-life of 32,760 years. It was discovered by Fajans, Hahn, Meitner, and others in uranium ores and has 29 radioactive isotopes.
Periodic Table of Elements: Los Alamos National Laboratory
网页Protactinium is a rare and radioactive element with the atomic number 91. It is a decay product of uranium and thorium, and has various oxidation states and compounds. Learn about its discovery, sources, hazards and applications from Los Alamos National Laboratory.
Pa Element or Protactinium Facts - ThoughtCo
网页2019年8月2日 · Learn about the history, properties, isotopes, and sources of protactinium, a rare and radioactive metal. Find out how protactinium is used in research and dating, and why it is expensive and hazardous.
Facts About Protactinium - Live Science
网页2013年9月17日 · Protactinium is a rare, radioactive metal that decays into actinium. Learn about its discovery, chemical and physical properties, isotopes, and sources from uranium ore and nuclear fuel.
Protactinium | Pa (Element) - PubChem
网页Protactinium was first isolated by Aristid V. Grosse in 1934. Protactinium is a rare, poisonous and expensive element that is present in uranium ores in very small amounts.
Protactinium (Pa)
网页Protactinium is the 91st element in the periodic table and has a symbol of Pa and atomic number of 91. It has an atomic weight of (231.03588) and a mass number of 231. Protactinium has ninety-one protons and one hundred forty neutrons in its nucleus, and ninety-one electrons in seven shells.
WebElements Periodic Table » Protactinium » the essentials
网页Learn about the essential properties, history, uses, and hazards of protactinium, a rare and radioactive metal in the actinoid series. Find data on isotopes, crystal structure, thermochemistry, and more.
Protactinium, Physical and Chemical Properties | SpringerLink
网页Learn about protactinium, a radioactive metal formed in the decay chain of uranium but not thorium. Find out its atomic and chemical properties, preparation methods, and compounds with references and citations.