| 单词 |
pentavalent |
| 释义 |
pentavalent, a. Chem.|pɛnˈtævələnt| [f. penta- + L. valēnt-em having power or value.] Having the combining power of five atoms of hydrogen or other univalent element; quinquivalent.
1871Roscoe Elem. Chem. 174 The elements of the nitrogen group possess a peculiarity by which they frequently appear as if they were pentavalent. 1881A. W. Williamson in Nature XXIV. 418/1 An atom of nitrogen or of antimony is only known to be trivalent in combination with hydrogen; but each of them occurs in form of a pentavalent compound with chlorine. |

英语词典包含277258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。
相关内容:
相关热词搜索:pentavalent英英词典英英释义英语词汇意思用法释义英语