天气预报 > 其他 > 铀是什么
铀是什么
更新时间: 2019-05-03 00:00:00  

原子序数为92的元素,其元素符号是U,是自然界中能够找到的最重元素。在自然界中存在三种同位素,均带有放射性,拥有非常长的半衰期。此外还有12种人工同位素。铀在1789年由马丁-海因里希-克拉普罗特发现。铀化合物早期用于瓷器的着色,在核裂变现象被发现后用作为核燃料。

关键词: 什么

铀是什么相关经验

天气预报

最新推荐

页面:/news/view-1106274/ | 耗时:0.8667 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=1106274 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1106274 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1106274 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1068212,1090424,1121528,1057607,1123793,1108145,1078194,1083249,1005452,1081757,1103070,1076732,1074820,1066526,1074916,1072290,1042020,1075482,1050369,1086520,1095223,1114692,1113692,1086290,1048354,1086480,1045825,1092308,1125329,1123251) ORDER BY field (ArticleID,1068212,1090424,1121528,1057607,1123793,1108145,1078194,1083249,1005452,1081757,1103070,1076732,1074820,1066526,1074916,1072290,1042020,1075482,1050369,1086520,1095223,1114692,1113692,1086290,1048354,1086480,1045825,1092308,1125329,1123251)