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Californium is a silvery-white actinide metal [12] with a melting point of 900 ± 30 °C (1,650 ± 50 °F) and an estimated boiling point of 1,743 K (1,470 °C; 2,680 °F). [13] The pure metal is malleable and is easily cut with a knife. Californium metal starts to vaporize above 300 °C (570 °F) when exposed to a vacuum. [14]
Californium (98 Cf) is an artificial element, and thus a standard atomic weight cannot be given. Like all artificial elements, it has no stable isotopes. The first isotope to be synthesized was 245 Cf in 1950. There are 20 known radioisotopes ranging from 237 Cf to 256 Cf and one nuclear isomer, 249m Cf.
February 9, 1950: Senator McCarthy announces that he has a list of 205 names of Communist employees in the U.S. State Department February 23, 1950: Asteroid 1950 DA discovered, 930 years before its possible impact with Earth February 9, 1950: Element 98, first synthesized, dubbed Californium
An environmentally beneficial species native to Kentucky was one of 21 species recently delisted. US declares species once found in Kentucky extinct. What does it mean for water quality?
Five Kentucky residents are behind bars for allegedly imprisoning a 2-year-old boy inside a caged area littered with feces and urine in their home, according to police.
Californium(III) oxychloride (CfOCl) was the first californium compound to be discovered. [15] Californium(III) polyborate is unusual in that californium is covalently bound to the borate. [16] Tris(cyclopentadienyl)californium(III) (Cp 3 Cf) presents itself as ruby red crystals.
An Ohio man was found alive after 14 days in the rough terrain of a Kentucky forest, just as crews were starting to lose hope, rescuers said.
This list of chemical elements named after places includes elements named both directly and indirectly for places. 41 of the 118 chemical elements have names associated with, or specifically named for, places around the world or among astronomical objects.