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- Einsteinium (5780 bytes)
25: | unknown; probably metallic,<br /> silvery white or gray
81: ...barding [[plutonium]] with [[neutron]]s and was discovered in the debris of the first [[nuclear weapon|...
84: ...ovember, [[1952]] (see [[Operation Ivy]]). They discovered the [[isotope]] einsteinium-253 ([[half-life...
86: ...ugh einsteinium was synthesized to prepare a macroscopic amount of Es-253. This sample weighed about 0....
89: ...e less than 30 minutes. This element also has 3 [[meta state]]s, with the most stable being Es-254m (t<s... - Technetium (32113 bytes)
20: | [[Transition metal]]s
29: | [[Image:Technetium.jpg|125px|]]<br>Silvery grey metallic
182: ...ive decay|radioactive]], crystalline [[transition metal]] are intermediate between [[rhenium]] and [[man...
184: ...called ''ekamanganese'', well before its actual discovery (see [[Mendeleev's predicted elements]]). In ...
187: Technetium is a silvery-grey radioactive [[metal]] with an appearance similar to [[platinum]]. Ho...
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