Question

Atomic no 55 belongs to which block of periodic table

Answer 1

Caesium

Answer:

Atomic number - 55

Relative atomic mass - 132.9(12C = 12 exactly)

Chemical name - Caesium (Cesium)

Symbol - Cs

Valency - +1

It lies in periods (row) 6 and s - block (means column-1)

extra important information :

Cesium is an Alkali metal.

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