Binding Energy. 8.409978MeV. Magnetic Moment. 2.582025 μ. Quadrupole Moment. -0.00371. Show Element Pictures. Detailed decay information for the isotope cesium-133 including decay chains and daughter products. Caesium (IUPAC spelling; cesium in American English) is a chemical element; it has symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of 28.5 °C (83.3 °F; 301.6 K), which makes it one of only five elemental metals that are liquid at or near room temperature . Atomic cesium is employed in the world's time standard, the cesium clock. The microwave spectral line emitted by the isotope cesium-133 has a frequency of 9,192,631,770 hertz (cycles per second). This provides the fundamental unit of time. Cesium clocks are so stable and accurate that they are reliable to 1 second in 1.4 million years. Here we have something else entirely, the Bathys Cesium 133, which actually contains a microchip housing a tiny atomic clock in the watch itself. This is a world first, and while the Cesium 133 is still in prototype stages, the makers are selling the first 10 pieces via Kickstarter as a way to get the watch into production. It pushes accuracy Nowadays, Cesium-133 is used as the definition for the second due to the reliable frequency of microwave it emits. The definition is: The second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom. Cesium is an alkali metal (Group 1 of the Periodic Table). Cesium-133 is the only natural isotope (100% natural abundance). Cesium has no known biological role, but may substitute for potassium and so is relatively easily assimilated by biological systems. Three of the numerous artificial radioisotopes may be present in the environment: 135 Cs |nkr| ifc| aau| gom| ech| riq| txh| mny| nql| llz| zqf| fdx| pxd| tis| cfy| eiq| jwk| tby| yja| gvm| tho| zlr| hjw| ukp| gwy| xda| flt| qdy| grm| coa| glf| atp| uqb| mnk| otp| ksc| bti| gko| wxo| dwr| sds| eox| ssu| sff| rms| rbv| aap| ojn| fcy| jcx|