字典網>> 英漢字典>> P開頭詞條>>promethium的意思

promethium

音標[prə'mi:θiəm] 讀音

漢語翻譯


【化】 鉕Pm

詞型變化:

簡寫符號:Pm 

英文解釋:

名詞 promethium:

  1. a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
    同義詞:Pm, atomic number 61

詳細解釋:


pro.me.thi.um

n.Symbol Pm (名詞)符號 Pm
A radioactive rare-earth element prepared by fission of uranium or by neutron bombardment of neodymium, having 4 isotopes with mass numbers ranging from 4 to 54 and used as a source of beta rays. Atomic number '; melting point ,'8=C; boiling point 2,4'0=C; valence 3.See table at element
鉅:放射性稀土元素,由鈾分裂或鈦的中子 * 而成,有十四個擁有從4到54的質量數的同位素,用作β射線源。原子序數';熔點,'8=C;沸點2,4'0=C;原子價為3參見 element

來源:
From Prometheus
源自 Prometheus

展開閱讀更多↓

猜你喜歡: