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The density of osmium is slightly greater than that of iridium; the two are so similar (22.587 versus 22.562 g/cm 3 at 20 °C) that each was at one time considered to be the densest element. Only in the 1990s were measurements made accurately enough (by means of X-ray crystallography ) to be certain that osmium is the denser of the two.
— "Values ranging from 21.3 to 21.5 gm/cm 3 at 20 °C have been reported for the density of annealed platinum; the best value being about 21.45 gm/cm 3 at 20 °C." 21.46 g/cm 3 — Rose, T. Kirke. The Precious Metals, Comprising Gold, Silver and Platinum .
North Annville Township is a second-class township in Lebanon County, Pennsylvania, United States, governed by a three-member Board of Supervisors. The population was 2,271 at the 2020 census. [2] It is part of the Lebanon, PA Metropolitan Statistical Area. Postal service is provided via rural delivery from Annville and Lebanon. There are no ...
According to the U.S. Census Bureau, the township has a total area of 1.6 square miles (4.1 km 2), of which 1.6 square miles (4.1 km 2) is land and 0.63% is water. Annville has a humid continental climate and is classified "Dfa" on Köppen climate classification. Annville gets warm to hot summers and cold winters. Winters bring 40" of snow ...
The Union water works was such a major feat of engineering, that Union Water Works quickly became the de facto name of the village as well. The canal began operation in 1827, and between 1828 and 1830 a branch canal was built north to Pine Grove to service the mines of the Southern Schuylkill Anthracite Coal Region of Pennsylvania. The branch ...
As of 1 Jan 2023, elements E119 and higher are not discovered. These are called theoretical elements. They can have article and other content pages though. Incidentally, this concerns period 8 completely.
Up to 99.63 °C (the boiling point of water at 0.1 MPa), at this pressure water exists as a liquid. Above that, it exists as water vapor. Note that the boiling point of 100.0 °C is at a pressure of 0.101325 MPa (1 atm), which is the average atmospheric pressure.
367.48 g·mol −1 Appearance black solid Density: 4.09 Melting point: 160 °C (320 °F; 433 K) Solubility in water. soluble Structure ... Osmium(V) chloride is an ...