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																										- 门捷列夫,季米特里·伊凡诺维奇1834-1907俄国化学家,是第一个设计并出版元素周期表的人(1869年)
Russian chemist who first devised and published the periodic table of the elements(1869). 
																										- 属,族元素周期表上的一栏
A column in the periodic table of the elements. 
																										- 周期律化学元素在周期表中有相似位置时具有相似特性的趋势
The tendency of chemical elements with similar positions in the periodic table to have similar properties. 
																										- 现在周期表包括人类已知的全部元素,这些元素按适当的顺序排列起来。
The periodic table now contains all the elements known to man arranged in their proper sequence. 
																
							 
						 
					 
				 
			
			 
		
		
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