Lutetium Element (Periodic Table)

Lutetium (Lu) is a chemical element of the periodic table, located in the group 3 and the period 6, and has the atomic number 71. It is the last element in the lanthanide series. It is a silvery-white metal, whose name comes from “Lutetia”, the ancient Latin name for Paris, in the Roman era. It is counted as one of the rare earth elements.

group

period

1
H

2
He

3
Li

4
Be

5
B

6
C

7
N

8
O

9
F

10
Ne

11
Na

12
Mg

13
Al

14
Si

15
P

16
S

17
Cl

18
Ar

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

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

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

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 Lutetium Element

Lutetium
‣ Lutetium appearance: silvery white
‣ Who discovered lutetium? When was lutetium discovered? Discovery: Carl Auer von Welsbach and Georges Urbain (1906) First isolation: Carl Auer von Welsbach (1906)
‣ Where is lutetium located on the periodic table? Location: Lutetium is found in the sixth row of the periodic table, next to the ytterbium element.
‣ What’s the atomic mass number for lutetium? Atomic number (Z): 71
‣ Lutetium symbol: Lu
‣ Lutetium atomic weight: 174.9668
‣ What block does lutetium belong to? Block: d-block
‣ In what group is the element lutetium? Group: 3
‣ Period of lutetium in the periodic table Period: 6
‣ Lutetium atomic radius: empirical: 174 pm
‣ Lutetium covalent radius: 187±8 pm
‣ Lutetium melting point: 1925 K (1652 °C, 3006 °F)
‣ Lutetium boiling point: 3675 K (3402 °C, 6156 °F)
‣ Electrons per shell of lutetium: 2, 8, 18, 32, 9, 2
‣ What is the electron configuration of lutetium? Electron configuration: [Xe] 4f¹⁴ 5d¹ 6s²
‣ Lutetium ionization energies: 1st: 523.5 kJ/mol 2nd: 1340 kJ/mol 3rd: 2022.3 kJ/mol
‣ What is the phase of lutetium? Phase (at r.t): solid
‣ Density of the element lutetium Density (near r.t): 9.841 g/cm³ when liquid (at m.p): 9.3 g/cm³
‣ Lutetium magnetic ordering: paramagnetic
‣ Lutetium natural occurrence: primordial
‣ Lutetium oxidation state: +3
‣ Electronegativity of lutetium: Pauling scale: 1.27
‣ Lutetium poisson’s ratio: 0.261
‣ Lutetium heat of fusion: ca. 22 kJ/mol
‣ Lutetium heat of vaporization: 414 kJ/mol
‣ Lutetium molar heat capacity: 26.86 J/(mol K)
‣ What is the crystal structure of lutetium? Crystal structure: hexagonal close-packed (hcp)
‣ Thermal expansion of lutetium: poly: 9.9 µm/(m.K) (at r.t)
‣ Thermal conductivity of lutetium: 16.4 W/(m.K)
‣ Lutetium electrical resistivity: poly: 582 nΩ.m (at r.t)
‣ Lutetium hardness Vickers hardness: 755-1160 MPa Brinell hardness: 890-1300 MPa
‣ Young’s modulus of lutetium: 68.6 GPa
‣ Shear modulus of lutetium: 27.2 GPa
‣ Bulk modulus of lutetium: 47.6 GPa
‣ Lutetium CAS number: 7439-94-3

‣ Lutetium vapor pressure

Vapor pressure
P (Pa)	1	10	100	1 k	10 k	100 k
at T (K)	1906	2103	2346	(2653)	(3072)	(3663)

‣ How many isotopes of lutetium are there?

Main isotopes of lutetium
Isotope	Abundance	Half-life (t_1/2)	Decay mode	Product
¹⁷³Lu	syn	1.37 y	ε	¹⁷³Yb
¹⁷⁴Lu	syn	3.31 y	ε	¹⁷⁴Yb
¹⁷⁵Lu	97.104 %		stable
¹⁷⁶Lu	2.599 %	3.78 × 10¹⁰ y	β^–	¹⁷⁶Hf

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Related:

Periodic Table of Elements

Also Read:

FAQs on Lutetium Element

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