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Lr Lawrencium
Element Information, Facts, Properties, Trends, Uses, Comparison with other elements

103
Lr
Lawrencium
Element 103 of Periodic table is Lawrencium with atomic number 103, atomic weight 262. Lawrencium, symbol Lr, has a Simple Hexagonal structure and color. Lawrencium is a Actinide element. It is part of group 3 (scandium family). Know everything about Lawrencium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.
103 Lr - Lawrencium | SchoolMyKids

Lawrencium is a synthetic chemical element with chemical symbol Lr (formerly Lw) and atomic number 103. It is named in honor of Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements. A radioactive metal, lawrencium is the eleventh transuranic element and is also the final member of the Actinide series.

It belongs to group 3 of the periodic table having trivial name . Scandium family is a periodic table group consisting of rare earth elements plus actinides.

Lawrencium Facts

Read key information and facts about element Lawrencium

NameLawrencium
Atomic Number103
Atomic SymbolLr
Atomic Weight262
PhaseSolid
Color-
Appearance-
ClassificationActinide
Group in Periodic Table3
Group Namescandium family
Period in Periodic Tableperiod 7
Block in Periodic Tabled -block
Electronic Configuration[Rn] 5f14 7s2 7p1
Electronic Shell Structure (Electrons per shell)2, 8, 18, 32, 32, 8, 3
Melting Point1900 K
Boiling Point-
CAS NumberCAS22537-19-5
Neighborhood Elements
123456789101112131415161718
1
1
H
Hydrogen
1.008

Atomic #

Electronic Shell #

Symbol
Name
Atomic Weight
HGas
HgLiquid
CSolid
Metals
Metalloids
NonMetals
Alkali metals
Alkali earth metals
Lanthanoids
Transition metals
Post-transition metals
Other nonmetals
Halogens
Nobel gas
Actinoids
2
He
Helium
4.003
2
3
Li
Lithium
6.941
4
Be
Beryllium
9.012
5
B
Boron
10.811
6
C
Carbon
12.011
7
N
Nitrogen
14.007
8
O
Oxygen
15.999
9
F
Fluorine
18.998
10
Ne
Neon
20.180
3
11
Na
Sodium
22.990
12
Mg
Magnesium
24.305
13
Al
Aluminium
26.982
14
Si
Silicon
28.085
15
P
Phosphorus
30.974
16
S
Sulfur
32.065
17
Cl
Chlorine
35.453
18
Ar
Argon
39.948
4
19
K
Potassium
39.098
20
Ca
Calcium
40.078
21
Sc
Scandium
44.956
22
Ti
Titanium
47.867
23
V
Vanadium
50.941
24
Cr
Chromium
51.996
25
Mn
Manganese
54.938
26
Fe
Iron
55.845
27
Co
Cobalt
58.933
28
Ni
Nickel
58.693
29
Cu
Copper
63.546
30
Zn
Zinc
65.409
31
Ga
Gallium
69.723
32
Ge
Germanium
72.640
33
As
Arsenic
74.922
34
Se
Selenium
78.960
35
Br
Bromine
79.904
36
Kr
Krypton
83.798
5
37
Rb
Rubidium
85.468
38
Sr
Strontium
87.620
39
Y
Yttrium
88.906
40
Zr
Zirconium
91.224
41
Nb
Niobium
92.906
42
Mo
Molybdenum
95.940
43
Tc
Technetium
98
44
Ru
Ruthenium
101.070
45
Rh
Rhodium
102.906
46
Pd
Palladium
106.420
47
Ag
Silver
107.868
48
Cd
Cadmium
112.411
49
In
Indium
114.818
50
Sn
Tin
118.710
51
Sb
Antimony
121.760
52
Te
Tellurium
127.600
53
I
Iodine
126.904
54
Xe
Xenon
131.293
6
55
Cs
Cesium
132.905
56
Ba
Barium
137.327
57 - 71
La - Lu
Lanthanides
72
Hf
Hafnium
178.490
73
Ta
Tantalum
180.948
74
W
Tungsten
183.840
75
Re
Rhenium
186.207
76
Os
Osmium
190.230
77
Ir
Iridium
192.217
78
Pt
Platinum
195.078
79
Au
Gold
196.967
80
Hg
Mercury
200.590
81
Tl
Thallium
204.383
82
Pb
Lead
207.200
83
Bi
Bismuth
208.980
84
Po
Polonium
209
85
At
Astatine
210
86
Rn
Radon
222
7
87
Fr
Francium
223
88
Ra
Radium
226
89 - 103
Ac - Lr
Actinides
104
Rf
Rutherfordium
261
105
Db
Dubnium
262
106
Sg
Seaborgium
266
107
Bh
Bohrium
264
108
Hs
Hassium
277
109
Mt
Meitnerium
268
110
Ds
Darmstadtium
281
111
Rg
Roentgenium
272
112
Cn
Copernicium
285
113
Nh
Nihonium
284
114
Fl
Flerovium
289
115
Mc
Moscovium
288
116
Lv
Livermorium
292
117
Ts
Tennessine
294
118
Og
Oganesson
294
Lanthanides
57
La
Lanthanum
138.905
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.908
60
Nd
Neodymium
144.240
61
Pm
Promethium
145
62
Sm
Samarium
150.360
63
Eu
Europium
151.964
64
Gd
Gadolinium
157.250
65
Tb
Terbium
158.925
66
Dy
Dysprosium
162.500
67
Ho
Holmium
164.930
68
Er
Erbium
167.259
69
Tm
Thulium
168.934
70
Yb
Ytterbium
173.040
71
Lu
Lutetium
174.967
Actinides
89
Ac
Actinium
227
90
Th
Thorium
232.038
91
Pa
Protactinium
231.036
92
U
Uranium
238.029
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
262

How to Locate Lawrencium 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 103 to find Lawrencium 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 Lawrencium on periodic table look for cross section of group 3 and period 7 in the modern periodic table.

Lawrencium History

The element Lawrencium was discovered by A. Ghiorso,T. Sikkeland,E. Larsh and M. Latimer in year 1961 in United States. Lawrencium was first isolated by in . Lawrencium derived its name from Ernest O. Lawrence, physicist.

First prepared by bombardment of californium with boron atoms.

Lawrencium Presence: Abundance in Nature and Around Us

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

 ppb by weight (1ppb =10^-7 %)ppb by atoms (1ppb =10^-7 %)
Abundance in Universe--
Abundance in Sun--
Abundance in Meteorites--
Abundance in Earth's Crust--
Abundance in Oceans--
Abundance in Humans--

Crystal Structure of Lawrencium

The solid state structure of Lawrencium is Simple Hexagonal.

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)

abc

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

alphabetagamma

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- 103 Lr Lawrencium - Crystal Structure | SchoolMyKids
Oxidation StatesSpace Group Number-
Crystal StructureSimple Hexagonal

Lawrencium Atomic and Orbital Properties

Lawrencium atoms have 103 electrons and the electronic shell structure is [2, 8, 18, 32, 32, 8, 3] with Atomic Term Symbol (Quantum Numbers) 2P1/2.

Atomic Number103
Number of Electrons (with no charge)103
Number of Protons103
Mass Number262
Number of Neutrons159
Shell structure (Electrons per energy level)2, 8, 18, 32, 32, 8, 3
Electron Configuration[Rn] 5f14 7s2 7p1
Valence Electrons7s2 7p1
Valence (Valency)3
Main Oxidation States3
Oxidation States3
Atomic Term Symbol (Quantum Numbers)2P1/2

Bohr Atomic Model of Lawrencium - Electrons per energy level

103 Lr Lawrencium - Electron Shell Structure | SchoolMyKids
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Ground State Electronic Configuration of Lawrencium - neutral Lawrencium atom

Abbreviated electronic configuration of Lawrencium

The ground state abbreviated electronic configuration of Neutral Lawrencium atom is [Rn] 5f14 7s2 7p1. The portion of Lawrencium 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 7s2 7p1, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Lawrencium

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

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f14 7s2 7p1

Electrons are filled in atomic orbitals as per the order determined by the Aufbau principle, Pauli Exclusion Principle and Hund’s Rule.

  • As per the Aufbau principle the electrons will occupy the orbitals having lower energies before occupying higher energy orbitals. According to this principle, electrons are filled in the following order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p…
  • The Pauli exclusion principle states that a maximum of two electrons, each having opposite spins, can fit in an orbital.
  • Hund's rule states that every orbital in a given subshell is singly occupied by electrons before a second electron is filled in an orbital.
  • Electron configuration of Lawrencium
    Atomic Structure of Lawrencium

    Lawrencium atomic radius is - , while it's covalent radius is - .

    Atomic Radius Calculated

    - (0 Å)

    Atomic Radius Empirical

    - (0 Å)

    Atomic Volume-
    Covalent Radius-
    Van der Waals Radius-
    Neutron Cross Section-
    Neutron Mass Absorption -

    Atomic Spectrum of Lawrencium

    Atomic Spectrum of Lawrencium | SchoolMyKids

    Lawrencium Chemical Properties: Lawrencium Ionization Energies and electron affinity

    The electron affinity of Lawrencium is - .

    Valence3
    Electronegativity1.3
    ElectronAffinity-

    Ionization Energy of Lawrencium

    Refer to table below for Ionization energies of Lawrencium

    Ionization energy numberEnthalpy - kJ/mol
    1st470

    Lawrencium Physical Properties

    Refer to below table for Lawrencium Physical Properties

    Density-
    Molar Volume-

    Elastic Properties

    Young Modulus-
    Shear Modulus-
    Bulk Modulus -
    Poisson Ratio-

    Hardness of Lawrencium - Tests to Measure of Hardness of Element

    Mohs Hardness-
    Vickers Hardness-
    Brinell Hardness-

    Lawrencium Electrical Properties

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

    Electrical Conductivity-
    Resistivity-
    Superconducting Point-

    Lawrencium Heat and Conduction Properties

    Thermal Conductivity-
    Thermal Expansion-

    Lawrencium Magnetic Properties

    Magnetic Type-
    Curie Point-
    Mass Magnetic Susceptibility-
    Molar Magnetic Susceptibility-
    Volume Magnetic Susceptibility-

    Optical Properties of Lawrencium

    Refractive Index-

    Acoustic Properties of Lawrencium

    Speed of Sound-

    Lawrencium Thermal Properties - Enthalpies and thermodynamics

    Refer to table below for Thermal properties of Lawrencium

    Melting Point1900 K (1626.85°C, 2960.33 °F)
    Boiling Point- (-273.15°C, -459.66999999999996 °F)
    Critical Temperature-
    Superconducting Point-

    Enthalpies of Lawrencium

    Heat of Fusion-
    Heat of Vaporization-
    Heat of Combustion-

    Lawrencium Isotopes - Nuclear Properties of Lawrencium

    Lawrencium has 16 isotopes, with between 251 and 266 nucleons. Lawrencium has 0 stable naturally occuring isotopes.

    Isotopes of Lawrencium - Naturally occurring stable Isotopes: -.

    IsotopeZNIsotope Mass% AbundanceT halfDecay Mode
    251Lr103148251Synthetic
    252Lr103149252Synthetic
    253Lr103150253Synthetic
    254Lr103151254Synthetic
    255Lr103152255Synthetic
    256Lr103153256Synthetic
    257Lr103154257Synthetic
    258Lr103155258Synthetic
    259Lr103156259Synthetic
    260Lr103157260Synthetic
    261Lr103158261Synthetic
    262Lr103159262Synthetic10 hAlphaEmission
    263Lr103160263Synthetic
    264Lr103161264Synthetic
    265Lr103162265Synthetic
    266Lr103163266Synthetic

    Database Search

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

    DatabaseIdentifier number
    CAS Number - Chemical Abstracts Service (CAS)CAS22537-19-5
    RTECS Number-
    CID Number -
    Gmelin Number-
    NSC Number-