Definitions for protactinium
ˌproʊ tækˈtɪn i əmpro·tac·tini·um

Princeton's WordNetRate this definition:0.0 / 0 votes

1. protactinium, protoactinium, Pa, atomic number 91noun

   a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

GCIDERate this definition:0.0 / 0 votes

1. Protactinium

   The radioactive chemical element, of atomic number 91; Atomic symbol Pa; at. wt. of longest-lived isotope, 231 (T

WiktionaryRate this definition:0.0 / 0 votes

1. protactiniumnoun

   a chemical element (symbol Pa) with atomic number 91.

2. Etymology: proto- + actinium

ChatGPTRate this definition:0.0 / 0 votes

1. protactinium

   Protactinium is a rare, radioactive, metallic chemical element with the symbol Pa and atomic number 91. It is one of the actinide series of 15 metallic elements and is found in minute quantities in the earth's crust, naturally arising from the decay of uranium and thorium. This element has no stable isotopes and was discovered in 1913. Due to its scarcity, high radioactivity and high toxicity, there are currently no uses for protactinium outside of basic scientific research.

WikidataRate this definition:0.0 / 0 votes

1. Protactinium

   Protactinium is a chemical element with the symbol Pa and atomic number 91. It is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical compounds where protactinium is usually present in the oxidation state +5, but can also assume +4 and even +2 or +3 states. 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. Because of its scarcity, high radioactivity and high toxicity, there are currently no uses for protactinium outside of scientific research, and for this purpose, protactinium is mostly extracted from spent nuclear fuel. Protactinium was first identified in 1913 by Kasimir Fajans and Oswald Helmuth Göhring and named brevium because of the short half-life of the specific isotope studied, namely protactinium-234. A more stable isotope of protactinium was discovered in 1917/18 by Otto Hahn and Lise Meitner, and they chose the name proto-actinium, but then the IUPAC named it finally protactinium in 1949 and confirmed Hahn and Meitner as discoverers. The new name meant "parent of actinium" and reflected the fact that actinium is a product of radioactive decay of protactinium.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Protactinium

   Protactinium. A radioactive element of the actinide group of metals. It has the atomic symbol Pa, atomic number 91, and atomic weight 231. It decays by alpha-emission.

Matched Categories

1. • Metallic Element

How to pronounce protactinium?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say protactinium in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of protactinium in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of protactinium in Pythagorean Numerology is: 6

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=protactinium
2. ^ GCIDE
   https://gcide.gnu.org.ua/?q=protactinium
3. ^ Wiktionary
   https://en.wiktionary.org/wiki/Protactinium
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=protactinium