Lawrencium Element (Periodic Table)

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Lawrencium

Lawrencium (Lr) is a chemical element of the periodic table, located in the group 3 and the period 7, and has the atomic number 103. It is the last element in the actinide series. It is a silvery-white metal which is named after the American scientist Ernest O. Lawrence, inventor of the cyclotron. It is the eleventh transuranium element and 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
– d block

FAQs on Lawrencium Element

Lawrencium
‣ What does lawrencium look like?

Appearance: silvery (predicted)
‣ Who discovered lawrencium and in what year?

Discovery: Lawrence Berkeley National Laboratory and Joint Institute for Nuclear Research (1961-1971)
‣ Where is lawrencium on the periodic table?

Lawrencium Periodic Table

Location: Lawrencium is found in the seventh row of the periodic table, next to the nobelium element.
‣ What is the atomic number of lawrencium?

Atomic number (Z): 103
‣ Lawrencium symbol: Lr
‣ What is the atomic weight for lawrencium?

Standard atomic weight: [266]
‣ Lawrencium belongs to which block in the periodic table?

Block: d-block
‣ What is the group number of the element lawrencium?

Group: 3
‣ Period of lawrencium in the periodic table

Period: 7
‣ What is the melting point for lawrencium?

Melting point: 1900 K (1627 °C, 2961 °F) (predicted)
‣ How many electron shells does lawrencium have?

Electrons per shell: 2, 8, 18, 32, 32, 8, 3
‣ What is the electron configuration of lawrencium?

Electron configuration: [Rn] 5f14 7s2 7p1
‣ Lawrencium ionization energies:
1st: 478.6 kJ/mol
2nd: 1428.0 kJ/mol (predicted)
3rd: 2219.1 kJ/mol (predicted)
‣ Is lawrencium a solid, liquid or gas?

Phase (at r.t): solid (predicted)
‣ Lawrencium density (near r.t): 14.4 g/cm3 (predicted)
‣ Lawrencium natural occurrence: synthetic
‣ Lawrencium oxidation state: +3
‣ What is the electronegativity of lawrencium?

Electronegativity: Pauling scale: 1.3 (predicted)
‣ Lawrencium crystal structure: hexagonal close-packed (hcp) (predicted)
‣ Lawrencium CAS number: 22537-19-5

‣ How many isotopes does lawrencium have?

Main isotopes of lawrencium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
254Lrsyn13 s78 % α
22 % ε		250Md
254No
255Lrsyn21.5 sα251Md
256Lrsyn27 sα252Md
259Lrsyn6.2 s78 % α
22 % SF		255Md
260Lrsyn2.7 minα256Md
261Lrsyn44 minSF/ε?
262Lrsyn3.6 hε262No
264Lrsyn3 hSF
266Lrsyn10 hSF

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