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Selenium
Melting Point of Technetium
Gd (Symbol of Gadolinium)
109 (Atomic Number of Meitnerium)
Ionization Energies of Samarium in kcal/mol
Cesium (Cs) Properties
Cs
Cesium
Properties
36 /
87
Atomic Mass
132.9
amu
Atomic Number
55
Block
S
Boiling Point
944
K
Conductivity (Electric)
5
MS/m
Conductivity (Thermal)
36
W/mK
Crystal Structure
Body-centered Cubic
Decay Mode
—
Density (Liquid)
1843
kg/m³
Density (STP)
1879
kg/m³
Electron Affinity
45.51
kJ/mol
Electron Configuration (Semantic)
[Xe] 6s¹
Electronegativity (Pauling)
0.79
Electrons per Shell
2, 8, 18, 18, 8, 1
Group
1
Half Life
Stable
year
Heat (Fusion)
2.09
kJ/mol
Heat (Molar)
32.21
J/K.mol
Heat (Specific)
242
J/(kg K)
Heat (Vaporization)
65
kJ/mol
Ionization Energies
375.7, 2234, 3400
kJ/mol
Isotopes Known
¹¹²Cs, ¹¹³Cs, ¹¹⁴Cs, ¹¹⁵Cs, ¹¹⁶Cs, ¹¹⁷Cs, ¹¹⁸Cs, ¹¹⁹Cs, ¹²⁰Cs, ¹²¹Cs, ¹²²Cs, ¹²³Cs, ¹²⁴Cs, ¹²⁵Cs, ¹²⁶Cs, ¹²⁷Cs, ¹²⁸Cs, ¹²⁹Cs, ¹³⁰Cs, ¹³¹Cs, ¹³²Cs, ¹³³Cs, ¹³⁴Cs, ¹³⁵Cs, ¹³⁶Cs, ¹³⁷Cs, ¹³⁸Cs, ¹³⁹Cs, ¹⁴⁰Cs, ¹⁴¹Cs, ¹⁴²Cs, ¹⁴³Cs, ¹⁴⁴Cs, ¹⁴⁵Cs, ¹⁴⁶Cs, ¹⁴⁷Cs, ¹⁴⁸Cs, ¹⁴⁹Cs, ¹⁵⁰Cs, ¹⁵¹Cs
Isotopes Stable
¹³³Cs
Magnetic Type
Paramagnetic
Melting Point
301.7
K
Molar Volume
0.000070732
Oxidation States
-1,1c
Period
6
Phase
Solid
@ 22°C
Quantum Numbers
2S1/2
Radius (Covalent)
225
pm
Radius (Empirical)
260
pm
25
Linear (pm)
260
Radius (Van Der Waals)
—
Series
Alkali Metal
Valence Electrons
1
Wikipedia
https://en.wikipedia.org/wiki/Cesium
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18
1
2
3
4
5
6
7
N
Sy
Name
Radius (Empirical)
Radius (Empirical)
pm
25
Linear
260
Cell colors represent Radius (Empirical) –
Show Series Instead
Lanthanides
(All Group 3)
6
Actinides
(All Group 3)
7
1
H
Hydrogen
25
2
He
Helium
3
Li
Lithium
145
4
Be
Beryllium
105
5
B
Boron
85
6
C
Carbon
70
7
N
Nitrogen
65
8
O
Oxygen
60
9
F
Fluorine
50
10
Ne
Neon
11
Na
Sodium
180
12
Mg
Magnesium
150
13
Al
Aluminum
125
14
Si
Silicon
110
15
P
Phosphorus
100
16
S
Sulfur
100
17
Cl
Chlorine
100
18
Ar
Argon
71
19
K
Potassium
220
20
Ca
Calcium
180
21
Sc
Scandium
160
22
Ti
Titanium
140
23
V
Vanadium
135
24
Cr
Chromium
140
25
Mn
Manganese
140
26
Fe
Iron
140
27
Co
Cobalt
135
28
Ni
Nickel
135
29
Cu
Copper
135
30
Zn
Zinc
135
31
Ga
Gallium
130
32
Ge
Germanium
125
33
As
Arsenic
115
34
Se
Selenium
115
35
Br
Bromine
115
36
Kr
Krypton
37
Rb
Rubidium
235
38
Sr
Strontium
200
39
Y
Yttrium
180
40
Zr
Zirconium
155
41
Nb
Niobium
145
42
Mo
Molybdenum
145
43
Tc
Technetium
135
44
Ru
Ruthenium
130
45
Rh
Rhodium
135
46
Pd
Palladium
140
47
Ag
Silver
160
48
Cd
Cadmium
155
49
In
Indium
155
50
Sn
Tin
145
51
Sb
Antimony
145
52
Te
Tellurium
140
53
I
Iodine
140
54
Xe
Xenon
55
Cs
Cesium
260
56
Ba
Barium
215
57
La
Lanthanum
195
58
Ce
Cerium
185
59
Pr
Praseodymium
185
60
Nd
Neodymium
185
61
Pm
Promethium
185
62
Sm
Samarium
185
63
Eu
Europium
185
64
Gd
Gadolinium
180
65
Tb
Terbium
175
66
Dy
Dysprosium
175
67
Ho
Holmium
175
68
Er
Erbium
175
69
Tm
Thulium
175
70
Yb
Ytterbium
175
71
Lu
Lutetium
175
72
Hf
Hafnium
155
73
Ta
Tantalum
145
74
W
Tungsten
135
75
Re
Rhenium
135
76
Os
Osmium
130
77
Ir
Iridium
135
78
Pt
Platinum
135
79
Au
Gold
135
80
Hg
Mercury
150
81
Tl
Thallium
190
82
Pb
Lead
180
83
Bi
Bismuth
160
84
Po
Polonium
190
85
At
Astatine
86
Rn
Radon
87
Fr
Francium
88
Ra
Radium
215
89
Ac
Actinium
195
90
Th
Thorium
180
91
Pa
Protactinium
180
92
U
Uranium
175
93
Np
Neptunium
175
94
Pu
Plutonium
175
95
Am
Americium
175
96
Cm
Curium
97
Bk
Berkelium
98
Cf
Californium
99
Es
Einsteinium
100
Fm
Fermium
101
Md
Mendelevium
102
No
Nobelium
103
Lr
Lawrencium
104
Rf
Rutherfordium
105
Db
Dubnium
106
Sg
Seaborgium
107
Bh
Bohrium
108
Hs
Hassium
109
Mt
Meitnerium
110
Ds
Darmstadtium
111
Rg
Roentgenium
112
Cn
Copernicium
113
Nh
Nihonium
114
Fl
Flerovium
115
Mc
Moscovium
116
Lv
Livermorium
117
Ts
Tennessine
118
Og
Oganesson
Group
Period
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