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- | IUPACName = Promethium(III) fluoride | OtherNames = Promethium trifluoride ...2 KB (228 words) - 15:38, 23 September 2023
- ...ed with the electropositive s-block metals. Covalent silicides and silicon compounds occur with hydrogen and the elements in groups 10 to 17. Many cluster compounds of lithium silicides are known, such as Li<sub>13</sub>Si<sub>4</sub>, Li<s ...58 KB (7,758 words) - 23:03, 27 September 2024
- |[[cerium|Ce]]||[[Praseodymium|Pr]]||[[Neodymium|Nd]]|| [[Promethium|Pm]] ||[[Samarium|Sm]]||[[Europium|Eu]]||[[Gadolinium|Gd]]||[[Terbium|Tb]]| ...ch as [[tin]] and [[antimony]], are clearly metals, but form only covalent compounds in the highest oxidation states: their aqua cations are restricted to their ...71 KB (10,784 words) - 22:25, 1 May 2024
- ...have stable isotopes ([[technetium]] ({{PhysicsParticle|Tc|BL=43}}) and [[promethium]] ({{PhysicsParticle|Pm|BL=61}}) have no stable isotopes). Of these 39 odd ...bon, nitrogen, and oxygen are commonly separated by gas diffusion of their compounds such as CO and NO. The separation of hydrogen and deuterium is unusual beca ...49 KB (7,021 words) - 12:46, 9 February 2025
- ...black; border-right:1px solid #f8f8f8; border-bottom:1px solid #f8f8f8"|[[Promethium|Pm]] ...{Citation needed|date=August 2024}} as are mercury vapour and many mercury compounds.<ref>{{harvnb|Kozin|Hansen|2013|p=80}}</ref> These five elements have a str ...150 KB (21,966 words) - 01:31, 25 February 2025