21. Its uranium and osmium content could have been caused by a nearby supernova. 22. The compound is used to prepare other osmium complexes. 23. Osmium is a hard but brittle metal that remains lustrous even at high temperatures.24. The hardness of osmium is moderately high at. 25. Osmium forms compounds with oxidation states ranging from " 2 to + 8.26. This could make osmium a potential candidate for a metal-hydride battery electrode. 27. These species oxidise to osmium ( VIII ) in the presence of such oxidants. 28. This method involves adding a high concentration of formamide to a osmium tetroxide fixative. 29. Osmium tetroxide boils at 130 �oxidizing agent.30. After only a few years, osmium was replaced by the more stable metal tungsten.
