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2013-05-23 12:21
求翻译:"Quartz" is a term that includes both well crystallized and compact forms of silica. For the most time the different quartz varieties have been considered as species of their own and have not been systematically grouped together before the 19th century. Their common chemical nature was discovered by the Swedish chemist是什么意思?![]() ![]() "Quartz" is a term that includes both well crystallized and compact forms of silica. For the most time the different quartz varieties have been considered as species of their own and have not been systematically grouped together before the 19th century. Their common chemical nature was discovered by the Swedish chemist
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2013-05-23 12:21:38
“石英”是一个术语,它包括硅结晶良好和紧凑的形式。石英的不同品种的大部分时间都被视为自己种的,并没有得到系统分组前19世纪。在18世纪末,由瑞典化学家贝格曼发现他们共同的化学性质和一段时间的硅被认为是一种化学元素。在1823他的同胞J.J.贝齐里乌斯分解石英,发现它是氧的化合物和一个新的元素,硅。后,人们意识到,所有这些品种的化学物质相同,二氧化硅,二氧化硅,他们被分成小组。
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2013-05-23 12:23:18
“石英”一词,也包括两个和紧凑型形式的硅结晶。 在石英品种不同的最长的时间已被认为是物种并没有有计划自己和组合在一起的前19世纪。 他们发现了共同的化学性的瑞典化学家贝格曼在18世纪,并在一段时间内被认为是一个硅化学成分。
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2013-05-23 12:24:58
正在翻译,请等待...
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2013-05-23 12:26:38
正在翻译,请等待...
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2013-05-23 12:28:18
正在翻译,请等待...
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