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Chemical element with atomic number 91 (Pa)
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
Protactinium
Protactinium (91Pa) has no stable isotopes. As 231Pa occurs in usable quantity, and comprises virtually all of the element, it defines the standard atomic
Isotopes_of_protactinium
F-block chemical elements
of protactinium. 233Pa has convenient half-life and energy of γ-radiation, and thus was used in most studies of protactinium chemistry. Protactinium-233
Actinide
Index of chemical compounds with the same name
Protactinium bromide may refer to: Protactinium(IV) bromide (protactinium tetrabromide), PaBr4 Protactinium(V) bromide (protactinium pentabromide), PaBr5
Protactinium_bromide
Index of chemical compounds with the same name
Protactinium oxide may refer to: Protactinium(II) oxide [Wikidata], PaO Protactinium(IV) oxide, PaO2 Protactinium(V) oxide, Pa2O5 Protactinium#Chemical
Protactinium_oxide
Chemical compound
Protactinium tetrafluoride is a binary inorganic compound of protactinium metal and fluorine with the chemical formula PaF4. Protactinium tetrafluoride
Protactinium_tetrafluoride
Chemical compound
Protactinium tetraiodide is a binary inorganic compound of protactinium metal and iodine with the chemical formula PaI4. Protactinium tetraiodide can
Protactinium_tetraiodide
Chemical compound
Protactinium(V) oxide is a chemical compound with the formula Pa2O5. When it is reduced with hydrogen, it forms PaO2. Aristid V. Grosse was first to prepare
Protactinium(V)_oxide
Isotope of uranium
half-life of about 22 minutes. Thorium-233 decays into protactinium-233 through beta decay. Protactinium-233 has a longer half-life of about 27 days to further
Uranium-233
half-life of only 22 minutes. Thorium-233 beta decays into protactinium-233. Protactinium-233 has a half-life of 27 days and beta decays into uranium-233;
Isotopes_of_uranium
English prefix proto- (from Greek prôtos 'first, before') + actinium; protactinium decays into actinium. Uranus, the seventh planet Neptune, the eighth
List_of_chemical_elements
Chemical compound
Protactinium(V) bromide is an inorganic compound. It is a halide of protactinium, consisting of protactinium and bromine. It is radioactive and has a chemical
Protactinium(V)_bromide
Chemical compound
Protactinium nitride is a binary inorganic compound of protactinium and nitrogen with the chemical formula PaN. The compound can be obtained from the
Protactinium_nitride
Austrian-Swedish nuclear physicist (1878–1968)
13-minute isotope was a protactinium isotope or not. It was a logical decision, having been the discoverers of protactinium." Between 1934 and 1938,
Lise_Meitner
Chemical compound
Protactinium monoxide is a radioactive inorganic compound and one of the oxides of protactinium. Its chemical formula is PaO. It is a black solid that
Protactinium_monoxide
Type of nuclear reactor that uses molten material as fuel
thorium salt absorbs neutrons and slowly converts its thorium to protactinium-233. Protactinium-233 can be left in the blanket region where neutron flux is
Liquid fluoride thorium reactor
Liquid_fluoride_thorium_reactor
1938 achievement in physics
found was an isotope of protactinium. This spurred Hahn and Meitner, the discoverers of the most stable isotope of protactinium, to conduct a four-year-long
Discovery_of_nuclear_fission
Chemical compound
Protactinium(IV) bromide is an inorganic compound. It is an actinide halide, composed of protactinium and bromine. It is radioactive, and has the chemical
Protactinium(IV)_bromide
Chemical compound
Protactinium(IV) oxide does not dissolve in H2SO4, HNO3, or HCl solutions, but reacts with HF. As protactinium(IV) oxide, like other protactinium compounds
Protactinium(IV)_oxide
Chemical compound
Protactinium trihydride is an inorganic compound with the chemical formula PaH3. It is isostructural with uranium trihydride and can be prepared by reacting
Protactinium_trihydride
Chemical compound
Protactinium triiodide is an inorganic chemical compound with the chemical formula PaI3. The compound can be obtained from PaI5 by heating at 350-380 °C
Protactinium_triiodide
German nuclear chemist and Nobel laureate (1879–1968)
Meitner discovered isotopes of the radioactive elements radium, thorium, protactinium and uranium. He also discovered the phenomena of atomic recoil and nuclear
Otto_Hahn
Chemical compound
Protactinium(V) fluoride is a fluoride of protactinium with the chemical formula PaF5. Protactinium(V) fluoride can be obtained by reacting protactinium(V)
Protactinium(V)_fluoride
uranium-238 occur primordially, while trace quantities of actinium, protactinium, neptunium, and plutonium exist as a result of radioactive decay and
Actinides_in_the_environment
German chemist (1889–1915)
teacher Kasimir Fajans, co-discovered the chemical element protactinium in 1913. Protactinium was first identified in 1913 by Kasimir Fajans and Oswald
Oswald_Helmuth_Göhring
Protactinium compounds are compounds containing the element protactinium (symbol: Pa). These compounds usually have protactinium in the +5 oxidation state
Protactinium_compounds
Chemical element with atomic number 90 (Th)
the periodic table, it lies to the right of actinium, to the left of protactinium, and below cerium. Pure thorium is very ductile and, as normal for metals
Thorium
Chemical compound
Protactinium(V) chloride is the chemical compound composed of protactinium and chlorine with the formula PaCl5. It forms yellow monoclinic crystals and
Protactinium(V)_chloride
Elements predicted but not found in 1869
234mPa. Protactinium-234m (named "brevium") was identified in Germany in 1913, but the name protactinium was not given until 1918, when protactinium-231 was
Mendeleev's predicted elements
Mendeleev's_predicted_elements
Chemical compound
Protactinium(IV) chloride is an inorganic compound. It is an actinide halide, a salt composed of protactinium and chlorine. It is radioactive, and has
Protactinium(IV)_chloride
Polish-American physical chemist (1887–1975)
the science of radioactivity and the co-discoverer of chemical element protactinium. He was four times nominated for the Nobel Prize—three times in Chemistry
Kazimierz_Fajans
Isotope of uranium
thorium-234 and protactinium-234, are beta particle emitters with half-lives of about 20 days and one minute respectively. Protactinium-234 decays to uranium-234
Uranium-238
Topics referred to by the same term
Ninety One Limited, an Anglo-South African asset management business Protactinium, atomic number 91 91 Aegina, a main-belt asteroid The international calling
91
Chemical compound
Protactinyl nitrate, protactinium(V) oxynitrate, or erroneously known as protactinium nitrate, is a radioactive chemical compound with the formula PaO(NO3)3·xH2O
Protactinyl_nitrate
Tabular arrangement of the chemical elements
d-block-like configurations in the gas phase; f-electrons appear already at protactinium. Uranium's actual configuration of [Rn]5f36d17s2 is in fact analogous
Periodic_table
Nuclear chemist (1905–1985)
able in 1927 to isolate protactinium(V) oxide and was later able to produce metallic protactinium by decomposition of protactinium(V) iodide. From 1948 to
Aristid_von_Grosse
half-life of 25.52 hours. When it decays, it emits a beta ray and forms protactinium-231, with a decay energy of 0.39 MeV. 232Th is the only primordial nuclide
Isotopes_of_thorium
Chemical element with atomic number 118 (Og)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Oganesson
Aspect of geology studying variations in isotope abundances in the natural environment
Isotope geochemistry is an aspect of geology based upon the study of natural variations in the relative abundances of isotopes of various elements. Variations
Isotope_geochemistry
Chemical compound
metals protactinium and iodine, or by reacting protactinium(V) chloride, protactinium(V) bromide or protactinium(V) oxide with silicon tetraiodide. It reacts
Protactinium(V)_iodide
Chemical element with atomic number 87 (Fr)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Francium
Chemical element with atomic number 92 (U)
primarily undergo alpha decay, except for 229U and 231U, which decay to protactinium isotopes via positron emission and electron capture, respectively; the
Uranium
Chemical element with atomic number 26 (Fe)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Iron
English nuclear chemist (1891–1972)
existence of different isotopes. She also helped to discover the element protactinium, which Dmitri Mendeleev had predicted should occur in the periodic table
Ada_Hitchins
Isotope of uranium
series includes isotopes of astatine, bismuth, francium, lead, polonium, protactinium, radium, radon, thallium, and thorium, all of which are present in natural
Uranium-235
Topics referred to by the same term
nitrates Phthalic anhydride Polyacrylonitrile, a polymer of acrylonitrile Protactinium nitride, chemical formula PaN Pan (newsreader), for Usenet Pan (programming
Pan
Chemical element with atomic number 93 (Np)
is common among the actinides. The crystal structures of neptunium, protactinium, uranium, and plutonium do not have clear analogs among the lanthanides
Neptunium
Chemical element with atomic number 105 (Db)
chromatographic experiments between 1988 and 1993. All group 5 elements and protactinium were extracted from concentrated hydrochloric acid; after mixing with
Dubnium
Chemical element with atomic number 99 (Es)
phase; such +2 state is not observed in many other actinides, including protactinium, uranium, neptunium, plutonium, curium and berkelium. Einsteinium(II)
Einsteinium
products for nuclei lighter than 237 Np are isotopes of uranium and protactinium, and the primary products after are isotopes of plutonium. Neptunium
Isotopes_of_neptunium
Type of nuclear reactor design
the lead nuclei. These spallation neutrons convert fertile thorium to protactinium-233 and after 27 days into fissile uranium-233 and drive the fission
Accelerator-driven subcritical reactor
Accelerator-driven_subcritical_reactor
Chemical element with atomic number 10 (Ne)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Neon
tellurium-104 7.2 lithium-12 <10 boron-18 <26 chlorine-30 <50 protactinium-219 53 sodium-37 60 protactinium-220m2 69 actinium-217 69 francium-215 86 lead-196m1
List of radioactive nuclides by half-life
List_of_radioactive_nuclides_by_half-life
Group of chemical elements
the radioactive isotope fluorine-23, which occurs via cluster decay of protactinium-231. A total of eighteen isotopes of fluorine have been discovered, with
Halogen
Chemical element with atomic number 19 (K)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Potassium
Chemical element with atomic number 84 (Po)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Polonium
Isotope of uranium
with a short half-life, 234Th nuclei emit a beta particle to become protactinium-234 (234Pa or more usually the isomer 234mPa). Finally, 234Pa or 234mPa
Uranium-234
Chemical element with atomic number 29 (Cu)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Copper
Isotope of uranium
because of parasitic (n,2n) reactions on uranium-233 itself, or on protactinium-233, or on thorium-232: 232Th (n,γ) 233Th (β−) 233Pa (β−) 233U (n,2n)
Uranium-232
Group 15 elements of the periodic table with valency 5
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Pnictogen
Nuclear fuel cycle
threat. Notably, the chemical separation of an intermediate isotope — protactinium-233 — that decays into 233U is a cause for concern. ... The International
Thorium_fuel_cycle
Topics referred to by the same term
historical facts to make predictions about future or otherwise unknown events Protactinium, symbol Pa, a chemical element Provider-aggregatable address space, a
Pa
Chemical element with atomic number 47 (Ag)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Silver
Chemical element with atomic number 74 (W)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Tungsten
1959–1961 Great Britain Atomic Energy Authority produced 125 g of 99.9% pure protactinium at a cost of $500000, giving the cost of 4000000 USD per kg. Periodic
Prices_of_chemical_elements
Chemical element with atomic number 53 (I)
the maximum known being in the pentaiodides of niobium, tantalum, and protactinium. Iodides can be made by reaction of an element or its oxide, hydroxide
Iodine
Chemical element with atomic number 14 (Si)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Silicon
Chemical element with atomic number 80 (Hg)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Mercury_(element)
Chemical element with atomic number 33 (As)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Arsenic
Chemical element with atomic number 27 (Co)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Cobalt
Chemical element with atomic number 8 (O)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Oxygen
Process of producing goods
– for producing titanium, zirconium, hafnium, vanadium, thorium, or protactinium Chemical engineering Industrial Extraction Mass production Multilevel
Industrial_processes
Chemical element with atomic number 24 (Cr)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Chromium
Periodic table of the elements with eight or more periods
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Extended_periodic_table
English radiochemist (1877–1956)
he announced the discovery of an isotope of the element later named protactinium. This slightly post-dated its discovery by the Germans Lise Meitner and
Frederick_Soddy
Related to Periodic Table
category (which are both monoisotopic and mononuclidic), and 2 (bismuth and protactinium) in the second category (mononuclidic but not monoisotopic, since they
Mononuclidic_element
Etymology of chemical elements
means "brief, short"; protactinium has a short half-life. The name was changed to "protoactinium" in 1918 and shortened to protactinium in 1949. Harper, Douglas
List of chemical element name etymologies
List_of_chemical_element_name_etymologies
Chemical element with atomic number 6 (C)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Carbon
Chemical element with atomic number 28 (Ni)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Nickel
Chemical element with atomic number 57 (La)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Lanthanum
Isotope of actinium
LCCN 2016935977. Fry, C.; Thoennessen, M. (2013). "Discovery of actinium, thorium, protactinium, and uranium isotopes". Atomic Data and Nuclear Data Tables. 99 (3):
Actinium-225
Column of elements in the periodic table of the chemical elements
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Group_(periodic_table)
Group of elements in the periodic table
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Group_11_element
Chemical element with atomic number 40 (Zr)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Zirconium
Chemical element with atomic number 82 (Pb)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Lead
Chemical element with atomic number 15 (P)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Phosphorus
Chemical element with atomic number 22 (Ti)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Titanium
Chemical element with atomic number 83 (Bi)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Bismuth
down a decay chain. Uranium-235 is in one such chain, and decays into protactinium-231 and then into other products. Uranium-238 is in a separate chain
Environmental_isotopes
Island country
they contain high levels of natural radioactivity, with thorium-230 and protactinium-231 heading the decay chains. This distribution of elements is found
Niue
Chemical element with atomic number 17 (Cl)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Chlorine
Hypothetical charge of an atom if all its bonds to different atoms were fully ionic
Archived from the original (PDF) on 2016-03-07. Pa(II) is known in protactinium monoxide (PaO); see Sellers, Philip A.; Fried, Sherman; Elson, Robert
Oxidation_state
Chemical element with atomic number 2 (He)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Helium
Chemical element with atomic number 38 (Sr)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Strontium
Chemical element with atomic number 13 (Al)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Aluminium
Chemical element with atomic number 16 (S)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Sulfur
Chemical element with atomic number 3 (Li)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Lithium
Chemical element with atomic number 11 (Na)
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Sodium
Abbreviations used in chemistry
thunder 91 Pa Protactinium proto- (from Greek prôtos, 'first, before') + actinium, which is produced through the radioactive decay of protactinium 92 U Uranium
Chemical_symbol
Periodic table group
Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium
Carbon_group
PROTACTINIUM
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Boy/Male
English
From the tree stump meadow.
Boy/Male
French
Horseman; knight.
Girl/Female
Hindu
Spirit of pink
Female
Hebrew
(עַלִּיזָה) Variant spelling of both Hebrew Aleeza and Alitza, ALIZA means "joy."Â
Boy/Male
Tamil
Lord Krishna
Girl/Female
Hindu, Indian
Discipline
Boy/Male
Indian
Determination
Girl/Female
Hindu
Lustrous
Girl/Female
French American Celtic English
Joy.
Girl/Female
Biblical
Idol of the covenant.
PROTACTINIUM
PROTACTINIUM
PROTACTINIUM
PROTACTINIUM
PROTACTINIUM