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Californium slowly tarnishes in air at room temperature. Californium compounds are dominated by the +3 oxidation state. The most stable of californium's twenty known isotopes is californium-251, with a half-life of 898 years. This short half-life means the element is not found in significant quantities in the Earth's crust.
Californium(IV) oxide (CfO 2) is a black-brown solid that has a cubic crystal structure with a lattice parameter, the distance between unit cells in the crystal, of 531.0 ± 0.2 pm. [7]
32 of these have names tied to the Earth and the other 10 have names connected to bodies in the Solar System. The first tables below list the terrestrial locations (excluding the entire Earth itself, taken as a whole) and the last table lists astronomical objects which the chemical elements are named after.
Later it was found that 289 Fl has different decay properties and that the first observed flerovium atom may have been its nuclear isomer 289m Fl. [ 61 ] [ 64 ] The observation of 289m Fl in this series of experiments may indicate the formation of a parent isomer of livermorium, namely 293m Lv, or a rare and previously unobserved decay branch ...
From 1 October 2015 to 6 April 2016, the Dubna team performed a similar experiment with 48 Ca projectiles aimed at a mixed-isotope californium target containing 249 Cf, 250 Cf, and 251 Cf, with the aim of producing the heavier oganesson isotopes 295 Og and 296 Og. Two beam energies at 252 MeV and 258 MeV were used.
The asteroid that killed most dinosaurs 66 million years ago left behind traces of its own origin.. Researchers think they know where the Chicxulub impactor came from based on levels of ruthenium ...
Theia, an ancient planet, collided with Earth to form the moon, scientists believe. A new study suggests Theia could have also formed mysterious blobs called large low-velocity provinces, or LLVPs.
[5] [6] Synthetic elements now present on Earth are the product of atomic bombs or experiments that involve nuclear reactors or particle accelerators, via nuclear fusion or neutron absorption. [7] Atomic mass for natural elements is based on weighted average abundance of natural isotopes in Earth's crust and atmosphere. For synthetic elements ...