Caesium. Symbol: Cs. Atomic Number: 55. Atomic Weight: 132.90545. It is one of the three metals which are liquid at room temperature. Cs-133 is the only stable isotope. Fifteen other radioisotopes exist. Reacts explosively with cold water.
MN (Manganese) is the element with an atomic mass of 55 (54.938). !
The element with an atomic number of 55 is Cesium (Cs). An atomic number is the...
Caesium, which is an Alkali Metal, is atomic number 55.
Atomic number 55 is Cesium, or Cs.
The element Cesium on the periodic table has the atomic number of 55. It's symbol...