请输入您要查询的词汇:

 

词汇 mendelevium
词源
mendelevium. All attempts to classify the elements had failed before Dmitri Ivanovich Mendeleyev (1834–1907) in- vented his own system in 1869–71. The Russian chemist’s Pe- riodic Law of the Chemical Elements arranged the elements in order of increasing atomic weight, making it easy to check the now commonplace tables in the vertical columns, and pro- vided spaces into which undiscovered elements would proba- bly fit. Mendeleyev taught organic chemistry at the University of St. Petersburg. Known as one of the greatest teachers of his time, his Principles of Chemistry (1869) was a standard text- book. The artificially produced radioactive element men- delevium was named in Mendeleyev’s honor in 1955 when four American scientists—Glenn Seaborg, Bernard Harvey, Gregory Choppin, and S. G. Thompson—formed it in the lab- oratory by bombarding the element einsteinium with alpha particles.
随便看

 

英语词源词典收录了13259条英语词源词条,基本涵盖了全部常用英语词汇的起源、历史,是研究英语词汇或通过词源学英语的必备工具。

 

Copyright © 2000-2024 Newdu.com.com All Rights Reserved
更新时间:2025/5/1 13:55:03