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19 hours ago · The longest-lived of these isotopes are the primordial 124 Xe, which undergoes double electron capture with a half-life of 1.8 × 10 22 yr, and 136 Xe, which undergoes double beta decay with a half-life of 2.11 × 10 21 yr. 129 Xe is produced by beta decay of 129 I, which has a half-life of 16 million years.
19 hours ago · Gasoline ( / ˈɡæsəliːn /) or petrol ( / ˈpɛtrəl /) is a petrochemical product characterized as a transparent, yellowish, and flammable liquid normally used as a fuel for spark-ignited internal combustion engines.
19 hours ago · Neptunium is a hard, silvery, ductile, radioactive actinide metal. In the periodic table, it is located to the right of the actinide uranium, to the left of the actinide plutonium and below the lanthanide promethium. [7] Neptunium is a hard metal, having a bulk modulus of 118 GPa, comparable to that of manganese. [8]
- a = 666.3b = 472.3c = 488.7
- Orthorhombic
- Pnma
- (α→β) 282 °C
19 hours ago · Indoor air quality ( IAQ) is the air quality within buildings and structures. Poor indoor air quality due to indoor air pollution is known to affect the health, comfort, and well-being of building occupants. It has also been linked to sick building syndrome, respiratory issues, reduced productivity, and impaired learning in schools.
