| Caesium | |
|---|---|
| Identification | |
Symbol |
Cs
|
Block |
S-block
|
Group |
Group 1: hydrogen and alkali metals
|
Period |
Period 6
|
| Atomic Information | |
Atomic Number |
55
|
Atomic Radius |
265 pm
|
Mass |
Unknown
|
Category |
Unknown
|
Standard state(298 K) |
Unknown
|
Electronic Configuration |
[ Xe ] 6s¹
|
Electronegativity (Pauling) |
Unknown
|
Unknown
| |
First ionisation energy |
Unknown
|
| Physical Properties | |
Color |
Pale gold
|
Melting Point |
301.7 K (28.5°C, 83.3°F)
|
Boiling Point |
944 K (671°C, 1240°F)
|
Density of solid |
At 20°C: 1.886 g/cm³
|
Unknown
| |
| Heat Properties | |
Enthalpy of fusion |
Unknown
|
Enthalpy of atomisation |
Unknown
|
Enthalpy of vaporisation |
Unknown
|
Caesium is a chemical element classified as an alkaline metal. Its symbol is Cs and its atomic number is 55.
Description[]
[]
| 1 H |
2 He | ||||||||||||||||
| 3 Li |
4 Be |
5 B |
6 C |
7 N |
8 O |
9 F |
10 Ne | ||||||||||
| 11 Na |
12 Mg |
13 Al |
14 Si |
15 P |
16 S |
17 Cl |
18 Ar | ||||||||||
| 19 K |
20 Ca |
21 Sc |
22 Ti |
23 V |
24 Cr |
25 Mn |
26 Fe |
27 Co |
28 Ni |
29 Cu |
30 Zn |
31 Ga |
32 Ge |
33 As |
34 Se |
35 Br |
36 Kr |
| 37 Rb |
38 Sr |
39 Y |
40 Zr |
41 Nb |
42 Mo |
43 Tc |
44 Ru |
45 Rh |
46 Pd |
47 Ag |
48 Cd |
49 In |
50 Sn |
51 Sb |
52 Te |
53 I |
54 Xe |
| 55 Cs |
56 Ba |
* | 72 Hf |
73 Ta |
74 W |
75 Re |
76 Os |
77 Ir |
78 Pt |
79 Au |
80 Hg |
81 Tl |
82 Pb |
83 Bi |
84 Po |
85 At |
86 Rn |
| 87 Fr |
88 Ra |
** | 104 Rf |
105 Db |
106 Sg |
107 Bh |
108 Hs |
109 Mt |
110 Ds |
111 Rg |
112 Cn |
113 Nh |
114 Fl |
115 Mc |
116 Lv |
117 Ts |
118 Og |
| 119 Uue |
120 Ubn |
*** | 158 Ups |
159 Upo |
160 Upe |
161 Uhn |
| * | 57 La |
58 Ce |
59 Pr |
60 Nd |
61 Pm |
62 Sm |
63 Eu |
64 Gd |
65 Tb |
66 Dy |
67 Ho |
68 Er |
69 Tm |
70 Yb |
71 Lu |
| ** | 89 Ac |
90 Th |
91 Pa |
92 U |
93 Np |
94 Pu |
95 Am |
96 Cm |
97 Bk |
98 Cf |
99 Es |
100 Fm |
101 Md |
102 No |
103 Lr |