Plutonium Element (Periodic Table)

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Plutonium

Plutonium (Pu) is a chemical element of the periodic table, located in the period 7, and has the atomic number 94. It is the sixth element in the actinide series. It is a bright, silvery-white metal that turns gray or yellow tarnish, when it is exposed to air. It is named after the planet Pluto. It is the second 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
– f block

FAQs on Plutonium Element

Plutonium
‣ What does plutonium look like?

Appearance: silvery white, tarnishing to dark gray in air
‣ When was plutonium discovered and by whom?

Discovery: Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin Mcmillan (1940-1941)
‣ Where is plutonium located on the periodic table?

Plutonium Periodic Table

Location: Plutonium is found in the seventh row of the periodic table, next to the neptunium element.
‣ What is the atomic number of plutonium?

Atomic number (Z): 94
‣ What is the symbol for plutonium?

Symbol: Pu
‣ What is the atomic weight of plutonium?

Standard atomic weight: [244]
‣ Which block does plutonium belong to?

Block: f-block
‣ What period is plutonium in the periodic table?

Period: 7
‣ Plutonium atomic radius: empirical: 159 pm
‣ Plutonium covalent radius: 187±1 pm
‣ What is plutonium melting point?

Melting point: 912.5 K (639.4 °C, 1182.9 °F)
‣ What is plutonium’s boiling point?

Boiling point: 3505 K (3228 °C, 5842 °F)
‣ How many electron shells does plutonium have?

Electrons per shell: 2, 8, 18, 32, 24, 8, 2
‣ What is the electron configuration of plutonium?

Electron configuration: [Rn] 5f6 7s2
‣ What is plutonium ionization energy?

Ionization energies:
1st: 584.7 kJ/mol
‣ What is the phase of plutonium?

Phase (at r.t): solid
‣ What is the density of plutonium?

Density (near r.t): 19.85 g/cm3
when liquid (at m.p): 16.63 g/cm3
‣ Plutonium magnetic ordering: paramagnetic
‣ Plutonium natural occurrence: from decay
‣ Plutonium oxidation state: +2, +3, +4, +5, +6, +7, +8
‣ What’s the electronegativity of plutonium?

Electronegativity: Pauling scale: 1.28
‣ Plutonium poisson’s ratio: 0.21
‣ Plutonium heat of fusion: 2.82 kJ/mol
‣ Plutonium heat of vaporization: 333.5 kJ/mol
‣ Plutonium molar heat capacity: 35.5 J/(mol K)
‣ Speed of sound in plutonium: 2260 m/s
‣ Plutonium crystal structure: monoclinic
‣ Thermal expansion of plutonium: 46.7 µm/(m.K) (at 25 °C)
‣ Thermal conductivity of plutonium: 6.74 W/(m.K)
‣ Plutonium electrical resistivity: 1.460 µΩ.m (at 0 °C)
‣ Young’s modulus of plutonium: 96 GPa
‣ Shear modulus of plutonium: 43 GPa
‣ Plutonium CAS number: 7440-07-5

‣ Plutonium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)175619532198251129263499

‣ How many isotopes does plutonium have?

Main isotopes of plutonium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
238Putrace87.74 ySF
α		–
234U
239Putrace2.41 × 104 ySF
α		–
235U
240Putrace6550 ySF
α		–
236U
241Pusyn14 yβ–
SF		241Am
–
242Pusyn3.73 × 105 ySF
α		–
238U
244Putrace8.08 × 107 yα
SF		240U
–

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