what is the atomic mass of Cesium and Francium
Answers
atomic mass of cesium ....132.90545u
atomic mass of francium...223u
CESIUM:- (Cs) , ATOMIC NO. = 55 , ATOMIC MASS = 132.90543(5) , MELTING POINT (C)= 28.40±0.01 , BOILING POINT (C) = 669.3
FRANCIUM:- Francium is a chemical element with the symbol Fr and atomic number 87. It used to be known as eka-caesium. It is extremely radioactive; its most stable isotope, francium-223 (originally called actinium K after the natural decay chain it appears in), has a half-life of only 22 minutes. It is the second-most electropositive element, behind only caesium, and is the second rarest naturally occurring element (after astatine).
CESIUM:- Caesium (IUPAC spelling[6]) (also spelled cesium (American spelling))[note 1] is a chemical element with the 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), which makes it one of only five elemental metals that are liquid at or near room temperature.
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