protactinium

prot·ac·tin·i·um

P p

Transcription

- US Pronunciation
- US IPA
- [proh-tak-tin-ee-uh m]
- /ˌproʊ tækˈtɪn i əm/

- US Pronunciation
- US IPA
- [proh-tak-tin-ee-uh m]
- /ˌproʊ tækˈtɪn i əm/

Definitions of protactinium word

noun protactinium a radioactive, metallic element. Symbol: Pa; atomic number: 91. 1
noun protactinium a toxic radioactive metallic element that occurs in uranium ores and is produced by neutron irradiation of thorium. Symbol: Pa; atomic no: 91; half-life of the most stable isotope, 231Pa: 32 500 years; valency: 4 or 5; relative density: 15.37 (calc.); melting pt: 1572°C 0
noun protactinium a rare, radioactive, metallic chemical element, one of the actinides, found in pitchblende: symbol, Pa; at. no., 91 0

See all 3 definitions of protactinium

Information block about the term

Origin of protactinium

First appearance:

before 1915

One of the 14% newest English words

First recorded in 1915-20; prot- + actinium

Historical Comparancy

Parts of speech for Protactinium

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

Full grammatical hierarchy of Protactinium

protactinium popularity

A pretty common term. Usually people know it’s meaning, but prefer to use a more spread out synonym. About 44% of English native speakers know the meaning and use word.

According to our data about 51% of words is more used. This is a rare but used term. It occurs in the pages of specialized literature and in the speech of educated people.

protactinium usage trend in Literature

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