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physical object > natural object > particle > element > column grouped element > transition metal > technetium
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technetium comparison table
Subject is a kind of has group has image has definition
synthetic elementelement  element which cannot be found as a mineral deposit
transition metalcolumn grouped elementa column number in the table of the elements  
technetiumsynthetic elementa column number in the table of the elements 

Next synthetic element: transuranium element    Up: synthetic element, transition metal    Previous synthetic element: promethium