am.er.i.ci.um
americium的音标和读音:
DJ音标发音: [ˌæməˈriʃi:əm]
KK音标发音: [ˌæməˈrɪʃiəm]
americium的词性:
n.Symbol Am (名词)符号 Am
1. A white metallic transuranic element of the actinide series, having isotopes with mass numbers from 237 to 246 and half-lives from 25 minutes to 7,950 years. Its longest-lived isotopes, Am 241 and Am 243, are alpha-ray emitters used as radiation sources in research. Atomic number 95; specific gravity 11.7; valence 3, 4, 5, 6.See table at element
镅:锕系元素中的一种白色超铀金属元素,其同位素原子序数是从237到246,半衰期从25分钟到7,950年。其寿命最长的同位素镅241和镅243在研究中用作α射线辐射源。原子序数为95;比重11.7;原子价为3,4,5,6参见 element
americium的词源: