U Uranium – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

92
U
Uranium

Uranium

Element 92 of Periodic table is Uranium with atomic number 92, atomic weight 238.02891. Uranium, symbol U, has a Base Centered Orthorhombic structure and Silver color. Uranium is a actinide element. Know everything about Uranium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.

92 U - Uranium | SchoolMyKids

Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-white metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.

How to Locate Uranium on Periodic Table

Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of electrons. The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and ends at bottom right (atomic number 118). Therefore you can directly look for atomic number 92 to find Uranium on periodic table.

Another way to read periodic table and locate an element is by using group number (column) and period number (row). To locate Uranium on periodic table look for cross section of group N/A and period 7 in the modern periodic table.

Table of Contents

Uranium History

The element Uranium was discovered by Martin Heinrich Klaproth in year 1789 in Germany . Uranium derived its name from Uranus, the seventh planet in the Solar System

Uranium Presence: Abundance in Nature and Around Us

The table below shows the abundance of Uranium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body.

  Ppb by weight (1ppb =10^-7 %)
Abundance in Universe 2×10-8%
Abundance in Sun 1×10-7%
Abundance in Meteorites 9.8×10-7%
Abundance in Earth's Crust 1.8e-06
Abundance in Oceans 3.3×10-7%
Abundance in Humans 1×10-7%

Crystal Structure of Uranium

The solid state structure of Uranium is Base Centered Orthorhombic.

The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in three dimensional space to form the structure.

Unit Cell Parameters

The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges Lattice Constants (a, b and c)

a b c
285.37 586.95 495.48 pm

and the angles between them Lattice Angles (alpha, beta and gamma).

alpha beta gamma
π/2 π/2 π/2

The positions of the atoms inside the unit cell are described by the set of atomic positions ( xi, yi, zi) measured from a reference lattice point.

The symmetry properties of the crystal are described by the concept of space groups. All possible symmetric arrangements of particles in three-dimensional space are described by the 230 space groups (219 distinct types, or 230 if chiral copies are considered distinct.

Space Group Name Cmcm 92 U Uranium - Crystal Structure | SchoolMyKids
Space Group Number 63
Crystal Structure Base Centered Orthorhombic

Uranium Atomic and Orbital Properties

Uranium atoms have 92 electrons and the electronic shell structure is [2, 8, 18, 32, 21, 9, 2] with Atomic Term Symbol (Quantum Numbers) 5L6.

Atomic Number 92
Number of Electrons (with no charge) 92
Number of Protons 92
Mass Number 238
Number of Neutrons 146
Shell structure (Electrons per energy level) [2, 8, 18, 32, 21, 9, 2]
Electron Configuration [Rn] 5f3 6d1 7s2
Valence Electrons 5f3 6d1 7s2
Oxidation State 1;2;3;4;5;6
Atomic Term Symbol (Quantum Numbers) 5L6

Shell Structure of Uranium - Electrons per energy level

92 U Uranium - Electron Shell Structure | SchoolMyKids
n s p d f
1 K 2
2 L 2 6
3 M 2 6 10
4 N 2 6 10 14
5 O 2 6 10 3
6 P 2 6 1
7 Q 2

Ground State Electronic Configuration of Uranium - neutral Uranium atom

The ground state electronic configuration of Neutral Uranium atom is [Rn] 5f3 6d1 7s2. The portion of Uranium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Rn]. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used.This is important as it is the Valence electrons 5f3 6d1 7s2, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Uranium

Complete ground state electronic configuration for the Uranium atom, Unabbreviated electronic configuration

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f3 6d1 7s2

Atomic Structure of Uranium

Uranium atomic radius is 175 pm, while it's covalent radius is N/A.

Atomic Radius

175 pm (1.75 Å)

Atomic Volume 12.4949559055 cm3
Covalent Radius N/A
Van der Waals Radius 186 pm
Neutron Cross Section 7.57 σa/barns

Atomic Spectrum of Uranium

Atomic Spectrum of Uranium | SchoolMyKids

Uranium Chemical Properties: Uranium Ionization Energies and electron affinity

The electron affinity of Uranium is N/A

Valence 6
Electronegativity 1.38
ElectronAffinity N/A

Ionization Energy of Uranium

Refer to table below for Ionization energies of Uranium

Ionization energy number Enthalpy - kJ/mol
1 597.6
2 1420

Uranium Physical Properties

Refer to below table for Uranium Physical Properties

Density 19.05 g/cm3
Molar Volume 12.4949559055 cm3

Elastic Properties

Young Modulus 208 GPa
Shear Modulus 111 GPa
Bulk Modulus 100 GPa
Poisson Ratio 0.23

Hardness of Uranium - Tests to Measure of Hardness of Element

Mohs Hardness 6 MPa
Vickers Hardness 1960 MPa
Brinell Hardness 2.4×103 MPa

Uranium Electrical Properties

Uranium is Conductor of electricity. Refer to table below for the Electrical properties of Uranium

Electrical Conductivity 3.6×106 S/m
Resistivity 2.8×10-7 m Ω
Superconducting Point 0.68

Uranium Heat and Conduction Properties

Thermal Conductivity 27 W/(m K)
Thermal Expansion 0.0000139 K-1

Uranium Magnetic Properties

Magnetic Type Paramagnetic
Curie Point N/A
Mass Magnetic Susceptibility 2.16×10-8
Molar Magnetic Susceptibility 5.14×10-9
Volume Magnetic Susceptibility 0.000411

Optical Properties of Uranium

Refractive Index N/A

Acoustic Properties of Uranium

Speed of Sound 3155 m/s

Uranium Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Uranium

Melting Point 1408 K (1135 °C)
Boiling Point 4.2×103 K (3927 °C)
Critical Temperature N/A
Superconducting Point 0.68

Enthalpies of Uranium

Heat of Fusion 14 kJ/mol
Heat of Vaporization 420 kJ/mol
Heat of Combustion N/A

Uranium Isotopes - Nuclear Properties of Uranium

Isotopes of rhodium. Naturally occurring Uranium has 1 stable isotope - None.

Isotope Isotope Mass % Abundance T half Decay Mode
217U  
218U  
219U  
220U  
221U  
222U  
223U  
224U  
225U  
226U  
227U  
228U  
229U  
230U  
231U  
232U  
233U  
234U   0.0055%
235U   0.72%
236U  
237U  
238U   99.2745%
239U  
240U  
241U  
242U  

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS Number CAS7440-61-1
RTECS Number RTECSYR3490000
DOT Hazard Class 7
DOT Numbers 2979
EU Number EU231-170-6
NFPA Fire Rating N/A
NFPA Hazards N/A
NFPA Health Rating N/A
NFPA Reactivity Rating N/A
Autoignition Point N/A
Flashpoint N/A

Database Search

List of unique identifiers to search the element in various chemical registry databases

Database Identifier number
CAS Number - Chemical Abstracts Service (CAS) CAS7440-61-1
CID Number CID23989
Gmelin Number Gmelin16315
NSC Number N/A
RTECS Number RTECSYR3490000

List of Elements
1 H - Hydrogen
2 He - Helium
3 Li - Lithium
4 Be - Beryllium
5 B - Boron
6 C - Carbon
7 N - Nitrogen
8 O - Oxygen
9 F - Fluorine
10 Ne - Neon
11 Na - Sodium
12 Mg - Magnesium
13 Al - Aluminium
14 Si - Silicon
15 P - Phosphorus
16 S - Sulfur
17 Cl - Chlorine
18 Ar - Argon
19 K - Potassium
20 Ca - Calcium
21 Sc - Scandium
22 Ti - Titanium
23 V - Vanadium
24 Cr - Chromium
25 Mn - Manganese
26 Fe - Iron
27 Co - Cobalt
28 Ni - Nickel
29 Cu - Copper
30 Zn - Zinc
31 Ga - Gallium
32 Ge - Germanium
33 As - Arsenic
34 Se - Selenium
35 Br - Bromine
36 Kr - Krypton
37 Rb - Rubidium
38 Sr - Strontium
39 Y - Yttrium
40 Zr - Zirconium
41 Nb - Niobium
42 Mo - Molybdenum
43 Tc - Technetium
44 Ru - Ruthenium
45 Rh - Rhodium
46 Pd - Palladium
47 Ag - Silver
48 Cd - Cadmium
49 In - Indium
50 Sn - Tin
51 Sb - Antimony
52 Te - Tellurium
53 I - Iodine
54 Xe - Xenon
55 Cs - Cesium
56 Ba - Barium
57 La - Lanthanum
58 Ce - Cerium
59 Pr - Praseodymium
60 Nd - Neodymium
61 Pm - Promethium
62 Sm - Samarium
63 Eu - Europium
64 Gd - Gadolinium
65 Tb - Terbium
66 Dy - Dysprosium
67 Ho - Holmium
68 Er - Erbium
69 Tm - Thulium
70 Yb - Ytterbium
71 Lu - Lutetium
72 Hf - Hafnium
73 Ta - Tantalum
74 W - Tungsten
75 Re - Rhenium
76 Os - Osmium
77 Ir - Iridium
78 Pt - Platinum
79 Au - Gold
80 Hg - Mercury
81 Tl - Thallium
82 Pb - Lead
83 Bi - Bismuth
84 Po - Polonium
85 At - Astatine
86 Rn - Radon
87 Fr - Francium
88 Ra - Radium
89 Ac - Actinium
90 Th - Thorium
91 Pa - Protactinium
92 U - Uranium
93 Np - Neptunium
94 Pu - Plutonium
95 Am - Americium
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
Metalloid
Nonmetals
Other Nonmetals
Halogens Noble Gas
Metals
Alkali Metals Alkaline Earth Metals
Transition Metals Post-Transition Metals
Lanthanide Actinide