Princeton University10 年
Cesium, Cs
Cesium is a metal in group IA of the periodic table with atomic number 55, an atomic weight of 132.905, and a density of 1.9 Mg/m 3. Its melting point is 28.7 C, and it boils at 690 C. The electronic ...
Volta Confirms Presence of High-Grade Gallium, Cesium, Tantalum and Lithium Mineralization ...
Channel sample assays up to 78.1ppm Ga, 1,970ppm Cs, 457ppm Ta and 2.98% Li2O at the Dempster East PegmatiteToronto, Ontario- ...
Redefining the second: Optical atomic clock achieves record accuracy in comparison measurement
The next generation of atomic clocks "ticks" with the frequency of a laser. This is about 100,000 times faster than the ...
Interesting Engineering on MSN13 天
China builds ‘impossible’ fridge-sized atomic clock for precise military operations
Chinese researchers have developed the world's smallest and most robust atomic clock that can survive the rigors of war.
The Eastern Herald13 天
Chinese scientists create atomic clock that could change the nature of future wars
Chinese scientists have created a highly accurate atomic clock that could change the nature of future wars. The NIM-TF3 ...
BBC6 年
US nuclear materials stolen last year are still missing
The Center for Public Integrity (CPI) reports that plutonium and cesium were stolen from the officials' car when they stayed overnight at a hotel. Authorities have not publicly commented on the ...