Question

what is the Atomic Number of Cesium?​

Answer 1

Caesium. Caesium (IUPAC spelling) (also spelled cesium (American spelling)) 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

Answer 2

Answer:

55

Explanation:

Caesium 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, which makes it one of only five elemental metals that are liquid at or near room temperature.

Symbol:               Cs

Atomic mass:      132.90545 u

Atomic number:  55

Melting point:      28.44 °C

Van der Waals radius: 343 pm

Electron configuration:   [Xe] 6s1

Electronegativity:    0.79