Uranium Element (Periodic Table)

Uranium

Uranium (U) is a chemical element of the periodic table, located in the period 7, and has the atomic number 92. It is the fourth element in the actinide series. It is a silvery-white metal which is named after the planet Uranus. It is counted as one of the radioactive elements.

group
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
period
1
1
H
2
He
2
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
3
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
4
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
5
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
6
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
7
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
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
– f block

FAQs on Uranium Element

Uranium
‣ What does uranium look like?

Appearance: silvery gray metallic; corrodes to a spalling black oxide coat in air
‣ When was uranium discovered and by whom?

Discovery: Martin Heinrich Klaproth (1789)
First isolation: Eugene-Melchior Peligot (1841)
‣ What row is uranium in on the periodic table?

Uranium Periodic Table

Location: Uranium is found in the seventh row of the periodic table, next to the protactinium element.
‣ What is uranium’s atomic number?

Atomic number (Z): 92
‣ What is uranium’s symbol?

Symbol: U
‣ What is the atomic weight of uranium?

Standard atomic weight: 238.02891
‣ In which block of the periodic table is uranium (u) found?

Block: f-block
‣ What period does uranium belong to?

Period: 7
‣ What is the atomic radius of uranium?

Atomic radius: empirical: 156 pm
Uranium covalent radius: 196±7 pm
Uranium Van der Waals radius: 186 pm
‣ What is uranium’s melting point?

Melting point: 1405.3 K (1132.2 °C, 2070 °F)
‣ What is uranium’s boiling point?

Boiling point: 4404 K (4131 °C, 7468 °F)
‣ How many electron shells does uranium have?

Electrons per shell: 2, 8, 18, 32, 21, 9, 2
‣ What is the correct electron configuration of uranium?

Electron configuration: [Rn] 5f3 6d1 7s2
Uranium ionization energies:
1st: 597.6 kJ/mol
2nd: 1420 kJ/mol
‣ What phase is uranium in at room temperature?

Phase (at r.t): solid
‣ What is uranium’s density?

Density (near r.t): 19.1 g/cm3
when liquid (at m.p): 17.3 g/cm3
Uranium magnetic ordering: paramagnetic
Uranium natural occurrence: primordial
‣ What’s the oxidation state of uranium?

Oxidation state: +3, +4, +5, +6
‣ What’s the electronegativity of uranium?

Electronegativity: Pauling scale: 1.38
Uranium poisson’s ratio: 0.23
Uranium heat of fusion: 9.14 kJ/mol
Uranium heat of vaporization: 417.1 kJ/mol
Uranium molar heat capacity: 27.665 J/(mol K)
Speed of sound in uranium: 3155 m/s (at 20 °C)
‣ What is the crystal structure of uranium?

Crystal structure: orthorhombic
Thermal expansion of uranium: 13.9 µm/(m.K) (at 25 °C)
Thermal conductivity of uranium: 27.5 W/(m.K)
Uranium electrical resistivity: 0.280 µΩ.m (at 0 °C)
‣ What is the hardness of uranium?

Vickers hardness: 1960-2500 MPa
Brinell hardness: 2350-3850 MPa
Young’s modulus of uranium: 208 GPa
Shear modulus of uranium: 111 GPa
Bulk modulus of uranium: 100 GPa
Uranium CAS number: 7440-61-1

‣ Uranium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)232525642859323437274402

‣ How many isotopes does uranium have?

Main isotopes of uranium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
232Usyn68.9 ySF
α

228Th
233Utrace1.592 × 105 ySF
α

229Th
234U0.005 %2.455 × 105 ySF
α

230Th
235U0.720 %7.04 × 108 ySF
α

231Th
236Utrace2.342 × 107 ySF
α

232Th
238U99.274 %4.468 × 109 yα
SF
ββ
234Th

238Pu

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