Caesium

Caesium (nai to Cesium) ek chemical element hae, jiske atomic number 55 , symbol Cs aur atomic mass 132.91 hae. Dui German chemists, Robert Bunsen aur Gustav Kirchhoff, Caesium ke 1860 me flame spectroscopy se paawe rahin.

Atomic Structure
Symbol	Cs
Atomic Number	55
Atomic Mass	g/mol
Periodic Table
Group	1
Row / Period	6
Element Category	Alkali dhaatu
Chhapa
Caesium ke electron shell

v • d • e Periodic table
H																															He
Li	Be																									B	C	N	O	F	Ne
Na	Mg																									Al	Si	P	S	Cl	Ar
K	Ca	Sc															Ti	V	Cr	Mn	Fe	Co	Ni	Cu	Zn	Ga	Ge	As	Se	Br	Kr
Rb	Sr	Y															Zr	Nb	Mo	Tc	Ru	Rh	Pd	Ag	Cd	In	Sn	Sb	Te	I	Xe
Cs	Ba	La	Ce	Pr	Nd	Pm	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Hf	Ta	W	Re	Os	Ir	Pt	Au	Hg	Tl	Pb	Bi	Po	At	Rn
Fr	Ra	Ac	Th	Pa	U	Np	Pu	Am	Cm	Bk	Cf	Es	Fm	Md	No	Lr	Rf	Db	Sg	Bh	Hs	Mt	Ds	Rg	Cn	Nh	Fl	Mc	Lv	Ts	Og
Alkali metals Alkaline earth metals Lanthanide Actinoids Transition metals Other metals Metalloids Other nonmetals Halogens Noble gases