protoactinium

(ˌprəʊtəʊækˈtɪnɪəm) n (Elements & Compounds) the former name of protactinium

Thesaurus

Noun

protoactinium - a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into leadatomic number 91, protactinium, Pametal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

protoactinium

protoactinium:

see protactiniumprotactinium
, radioactive chemical element; symbol Pa; at. no. 91; mass number of most stable isotope 231; m.p. greater than 1,600&degC;; b.p. 4,026&degC;; sp. gr. 15.37 (calculated); valence +4, +5. Protactinium is a malleable, shiny silver-gray radioactive metal.
..... Click the link for more information. .

MedicalSeeprotactinium

protoactinium

noun

Synonyms for protoactinium

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

Synonyms

atomic number 91
protactinium
Pa

Related Words

metal
metallic element

随便看

英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。