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- ...de of a heat resistant materials, such as ceramic, metal (alloys, platinum-group or refractory metals) or certain oxides ([[aluminium oxide|alumina]], quart4 KB (529 words) - 20:26, 14 August 2023
- | MolShape = Linear ([[point group]] C<sub>∞''v''</sub>) ...the oxidation of [[ammonia]] at 750–900 °C (usually at 850 °C) with [[platinum]] as [[catalyst]]:5 KB (645 words) - 10:00, 8 June 2024
- [[Platinum group metals]], due to their very high melting point cannot be melt economically8 KB (1,320 words) - 19:04, 23 July 2020
- *Group I ([[alkali metal]]s): [[lithium]] (Li), [[sodium]] (Na), [[potassium]] (K) *Group II ([[alkaline earth metal]]s): [[beryllium]] (Be), [[magnesium]] (Mg), [[c5 KB (606 words) - 20:28, 11 October 2022
- *[https://www.sciencemadness.org/whisper/viewthread.php?tid=24036 Platinum Group Metal extraction from Galena ore]4 KB (491 words) - 09:35, 12 December 2021
- ...benzene ring", after the simple aromatic compound [[benzene]], or a phenyl group when part of a larger compound. ...gs. This is usually done with elemental [[hydrogenation]] using a platinum group metal catalyst at high pressure.4 KB (574 words) - 14:58, 2 January 2022
- ...periodic law. For example, the [[halogen]]s lie in the second-last column (group 17) and share similar properties, such as high reactivity and the tendency ...s and gains an electron, and so behaves chemically as both a group 1 and a group 17 element.5 KB (730 words) - 13:40, 9 January 2022
- ...ock]] columns (between groups 2 and 3) are not numbered. The elements in a group have similar physical or chemical characteristics of the outermost electron The modern periodic table uses the numbering system of "group 1" to "group 18". The system of eighteen groups is generally accepted by the chemistry c1 KB (207 words) - 19:18, 6 September 2022
