41. In 1955, the caesium atomic clock was invented. 42. Prussian blue helps the body excrete caesium -137. 43. In the gas phase, molecular caesium fluoride has a polar covalent bond. 44. The caesium and potassium salts are the least soluble. 45. For that reason, caesium atoms are used as the definition of the second. 46. Also called the " caesium chloride structure ", 47. During magma crystallization, caesium is concentrated in the liquid phase and crystallizes last. 48. Caesium was not recognized as a high-performance industrial metal until the 1950s.49. Applications for nonradioactive caesium included magnetohydrodynamic power generators. 50. Caesium salts have been evaluated as antishock reagents following the administration of arsenical drugs.
