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Helium
Atomic Number of Selenium
No (Symbol of Nobelium)
31 (Atomic Number of Gallium)
Atomic Mass of Calcium in kg
Ga
Gallium
Properties
Isotopes
Electrons
37 /
89
Atomic Mass
69.72
amu
Atomic Number
31
Block
P
Boiling Point
2477
K
Conductivity (Electric)
7.1
MS/m
Conductivity (Thermal)
29
W/mK
Crystal Structure
Base Orthorhombic
Decay Mode
—
Density (Liquid)
6095
kg/m³
Density (STP)
5904
kg/m³
Electron Affinity
28.9
kJ/mol
Electron Configuration (Semantic)
[Ar] 3d¹⁰ 4s² 4p¹
Electronegativity (Pauling)
1.81
kJ/mol
Electrons Per Shell
2, 8, 18, 3
Energy Levels
2, 8, 18, 3
e⁻️
Group
13
Half Life
Stable
year
Heat (Fusion)
5.59
kJ/mol
Heat (Molar)
25.86
J/K.mol
Heat (Specific)
371
J/(kg K)
Heat (Vaporization)
256
kJ/mol
Ionization Energies
578.8, 1979, 2963, 6180
kJ/mol
Isotopes Known
⁵⁶Ga, ⁵⁷Ga, ⁵⁸Ga, ⁵⁹Ga, ⁶⁰Ga, ⁶¹Ga, ⁶²Ga, ⁶³Ga, ⁶⁴Ga, ⁶⁵Ga, ⁶⁶Ga, ⁶⁷Ga, ⁶⁸Ga, ⁶⁹Ga, ⁷⁰Ga, ⁷¹Ga, ⁷²Ga, ⁷³Ga, ⁷⁴Ga, ⁷⁵Ga, ⁷⁶Ga, ⁷⁷Ga, ⁷⁸Ga, ⁷⁹Ga, ⁸⁰Ga, ⁸¹Ga, ⁸²Ga, ⁸³Ga, ⁸⁴Ga, ⁸⁵Ga, ⁸⁶Ga
Isotopes Stable
⁶⁹Ga, ⁷¹Ga
Magnetic Type
Diamagnetic
Melting Point
302.9
K
Molar Volume
0.000011809
Oxidation States
1,2,3c
Period
4
Phase
Solid
@ 22°C
Quantum Numbers
2P1/2
Radius (Covalent)
126
pm
Radius (Empirical)
130
pm
Radius (Van Der Waals)
187
pm
Series
Post-Transition Metal
Valence Electrons
3
Wikipedia
https://en.wikipedia.org/wiki/Gallium
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17
18
1
2
3
4
5
6
7
N
Sy
Name
Atomic Mass
Series
Metals
Nonmetals
Alkali Metal
Alkaline Earth Metal
Lanthanide
Actinide
Transition Metal
Post-Transition Metal
Metalloid
Polyatomic Nonmetal
Diatomic Nonmetal
Noble Gas
Lanthanides
(All Group 3)
6
Actinides
(All Group 3)
7
1
H
Hydrogen
1.008
2
He
Helium
4.003
3
Li
Lithium
6.94
4
Be
Beryllium
9.012
5
B
Boron
10.81
6
C
Carbon
12.01
7
N
Nitrogen
14.01
8
O
Oxygen
16
9
F
Fluorine
19
10
Ne
Neon
20.18
11
Na
Sodium
22.99
12
Mg
Magnesium
24.3
13
Al
Aluminum
26.98
14
Si
Silicon
28.09
15
P
Phosphorus
30.97
16
S
Sulfur
32.06
17
Cl
Chlorine
35.45
18
Ar
Argon
39.95
19
K
Potassium
39.1
20
Ca
Calcium
40.08
21
Sc
Scandium
44.96
22
Ti
Titanium
47.87
23
V
Vanadium
50.94
24
Cr
Chromium
52
25
Mn
Manganese
54.94
26
Fe
Iron
55.85
27
Co
Cobalt
58.93
28
Ni
Nickel
58.69
29
Cu
Copper
63.55
30
Zn
Zinc
65.38
31
Ga
Gallium
69.72
32
Ge
Germanium
72.63
33
As
Arsenic
74.92
34
Se
Selenium
78.97
35
Br
Bromine
79.9
36
Kr
Krypton
83.8
37
Rb
Rubidium
85.47
38
Sr
Strontium
87.62
39
Y
Yttrium
88.91
40
Zr
Zirconium
91.22
41
Nb
Niobium
92.91
42
Mo
Molybdenum
95.95
43
Tc
Technetium
98
44
Ru
Ruthenium
101.1
45
Rh
Rhodium
102.9
46
Pd
Palladium
106.4
47
Ag
Silver
107.9
48
Cd
Cadmium
112.4
49
In
Indium
114.8
50
Sn
Tin
118.7
51
Sb
Antimony
121.8
52
Te
Tellurium
127.6
53
I
Iodine
126.9
54
Xe
Xenon
131.3
55
Cs
Cesium
132.9
56
Ba
Barium
137.3
57
La
Lanthanum
138.9
58
Ce
Cerium
140.1
59
Pr
Praseodymium
140.9
60
Nd
Neodymium
144.2
61
Pm
Promethium
145
62
Sm
Samarium
150.4
63
Eu
Europium
152
64
Gd
Gadolinium
157.3
65
Tb
Terbium
158.9
66
Dy
Dysprosium
162.5
67
Ho
Holmium
164.9
68
Er
Erbium
167.3
69
Tm
Thulium
168.9
70
Yb
Ytterbium
173
71
Lu
Lutetium
175
72
Hf
Hafnium
178.5
73
Ta
Tantalum
180.9
74
W
Tungsten
183.8
75
Re
Rhenium
186.2
76
Os
Osmium
190.2
77
Ir
Iridium
192.2
78
Pt
Platinum
195.1
79
Au
Gold
197
80
Hg
Mercury
200.6
81
Tl
Thallium
204.4
82
Pb
Lead
207.2
83
Bi
Bismuth
209
84
Po
Polonium
209
85
At
Astatine
210
86
Rn
Radon
222
87
Fr
Francium
223
88
Ra
Radium
226
89
Ac
Actinium
227
90
Th
Thorium
232
91
Pa
Protactinium
231
92
U
Uranium
238
93
Np
Neptunium
237
94
Pu
Plutonium
244
95
Am
Americium
243
96
Cm
Curium
247
97
Bk
Berkelium
247
98
Cf
Californium
251
99
Es
Einsteinium
252
100
Fm
Fermium
257
101
Md
Mendelevium
258
102
No
Nobelium
259
103
Lr
Lawrencium
266
104
Rf
Rutherfordium
267
105
Db
Dubnium
268
106
Sg
Seaborgium
269
107
Bh
Bohrium
270
108
Hs
Hassium
269
109
Mt
Meitnerium
278
110
Ds
Darmstadtium
281
111
Rg
Roentgenium
282
112
Cn
Copernicium
285
113
Nh
Nihonium
286
114
Fl
Flerovium
289
115
Mc
Moscovium
289
116
Lv
Livermorium
293
117
Ts
Tennessine
294
118
Og
Oganesson
294
Group
Period
Periodic
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