On this page you'll find 10+ example sentences with Protactinium. Discover the meaning, synonyms such as metal and how to use the word correctly in a sentence.
Protactinium in a sentence
Protactinium meaning
A chemical element (symbol Pa) with atomic number 91. A dense, silvery-gray actinide metal.
Synonyms of Protactinium
Using Protactinium
- The main meaning on this page is: A chemical element (symbol Pa) with atomic number 91. A dense, silvery-gray actinide metal.
- Useful related words include: protoactinium, pa, atomic number 91, metallic element.
- In the example corpus, protactinium often appears in combinations such as: of protactinium, protactinium is, and protactinium.
Context around Protactinium
- Average sentence length in these examples: 20.6 words
- Position in the sentence: 10 start, 10 middle, 0 end
- Sentence types: 20 statements, 0 questions, 0 exclamations
Corpus analysis for Protactinium
- In this selection, "protactinium" usually appears near the start of the sentence. The average example has 20.6 words, and this corpus slice is mostly made up of statements.
- Around the word, colored, halides, reduces, iii, ions and 231 stand out and add context to how "protactinium" is used.
- Recognizable usage signals include 7 of protactinium originates from and 8 where protactinium ion is. That gives this page its own corpus information beyond isolated example sentences.
- By corpus frequency, "protactinium" sits close to words such as abated, aberrations and activations, which helps place it inside the broader word index.
Example types with protactinium
The same corpus examples are grouped by length and sentence type, making it easier to see the contexts in which the word appears:
Nearly all natural protactinium is protactinium-231. (7 words)
As with oxides, protactinium forms mixed halides with alkali metals. (10 words)
Protactinium(III) iodide was obtained by heating protactinium(V) iodide in vacuum. (12 words)
Analysis of the relative concentrations of various uranium, thorium and protactinium isotopes in water and minerals is used in radiometric dating of sediments which are up to 175,000 years old and in modeling of various geological processes. (38 words)
At room temperature, protactinium crystallizes in body-centered tetragonal structure which can be regarded as distorted body-centered cubic lattice; this structure does not change upon compression up to 53 GPa. (31 words)
So, thorium and protactinium, but not uranium compounds are poorly soluble in aqueous solutions, and precipitate into sediments; the precipitation rate is faster for thorium than for protactinium. (28 words)
Example sentences (20)
Brown-colored protactinium(III) iodide has been reported where protactinium ions are 8-coordinated in a bicapped trigonal prismatic arrangement.
Greenwood, p. 1270 Coordination of protactinium (solid circles) and halogen atoms (open circles) in protactinium(V) fluoride or chloride.
Halides Protactinium(V) fluoride forms white crystals where protactinium ions are arranged in pentagonal bipyramids and coordinated by 7 other ions.
In a simplified scenario, lithium selectively reduces protactinium salts to protactinium metal which is then extracted from the molten-salt cycle, and bismuth is merely a carrier.
Nearly all natural protactinium is protactinium-231.
Protactinium carbide PaC is formed by reduction of protactinium tetrafluoride with barium in a carbon crucible at a temperature of about 1400 °C.
Protactinium(III) iodide was obtained by heating protactinium(V) iodide in vacuum.
Protactinium(V) fluoride and protactinium(V) chloride have a polymeric structure of monoclinic symmetry.
So, thorium and protactinium, but not uranium compounds are poorly soluble in aqueous solutions, and precipitate into sediments; the precipitation rate is faster for thorium than for protactinium.
The coordination 7 of protactinium originates from the 5 halide atoms and two bonds to protactinium atoms belonging to the nearby chains.
The protactinium coordination in all its tetrahalides is 8, but the arrangement is square antiprismatic in protactinium(IV) fluoride and dodecahedral in the chloride and bromide.
All the isotopes have short lifetime, except for protactinium-231 (half-life 32,760 years).
Among those, most remarkable is Na 3 PaF 8 where protactinium ion is symmetrically surrounded by 8 F − ions which form a nearly perfect cube.
An alternative reaction is between protactinium pentachloride and hydrogen bromide or thionyl bromide.
Analysis of the relative concentrations of various uranium, thorium and protactinium isotopes in water and minerals is used in radiometric dating of sediments which are up to 175,000 years old and in modeling of various geological processes.
As protactinium is present in small amounts in most natural products and materials, it is ingested with food or water and inhaled with air.
As with oxides, protactinium forms mixed halides with alkali metals.
At room temperature, protactinium crystallizes in body-centered tetragonal structure which can be regarded as distorted body-centered cubic lattice; this structure does not change upon compression up to 53 GPa.
Before the advent of nuclear reactors, protactinium was separated for scientific experiments from uranium ores.
For many years, this was the world's only significant supply of protactinium, which was provided to various laboratories for scientific studies.
Common combinations with protactinium
These word pairs occur most frequently in English texts:
- of protactinium 7×
- protactinium is 5×
- and protactinium 5×
- where protactinium 4×
- protactinium ions 4×
- the protactinium 4×
- protactinium fluoride 3×
- to protactinium 3×
- protactinium iii 2×
- in protactinium 2×