Lawrencium Element (Periodic Table)

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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