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 | Pa (Element) - PubChem Protactinium is a chemical element with symbol Pa and atomic number 91 Classified as a n actinide, Protactinium is a solid at 25°C (room temperature) [Rn]7s 2 5f 2 6d 1 J C Slater, J Chem Phys, 1964, 41 (10), 3199-3205 DOI:10 1063 1 1725697
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 It occurs in all uranium ores to the extent of 0 34 part per million of uranium Its existence was predicted by Russian chemist Dmitry Mendeleyev in his 1871
Protactinium | History, Uses, Facts, Physical Chemical Characteristics Protactinium is dense silver grey metal It is highly radioactive It belongs to actinide series and is placed between thorium and uranium in the periodic table The melting point of protactinium is lower than thorium but higher than that of uranium Protactinium crystallizes and forms a rigid tetragonal structure at room temperature
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
Facts About Protactinium - Live Science One of the rarest naturally occurring elements, protactinium occurs in Earth’s crust in average concentrations of a few parts per trillion This rarity makes it one of the most expensive natural
Protactinium Facts, Symbol, Discovery, Properties, Uses - Chemistry Learner What is Protactinium Protactinium is a highly radioactive metal belonging to the family of actinides and denoted by the chemical symbol Pa [1] It has 27 isotopes with mass numbers ranging from 212 to 238 out of which protactinium-231 is the most stable one with a half-life of 3 276 x 10 4 years
Protactinium: Element 91 - Uses, Properties, and Facts Explore the intriguing world of Protactinium, Element 91 Learn about its history, properties, uses, and why it’s a fascinating subject in scientific research From its discovery to its chemical reactions and potential applications, delve deep into this rare and radioactive element
Protactinium (Pa) 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