Fermium Element (Periodic Table)

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Fermium

Fermium (Fm) is a chemical element of the periodic table, located in the period 7, and has the atomic number 100. It is the twelfth element in the actinide series. It is a silvery-white metal which is named after the Italian-born nuclear physicist Enrico Fermi. It is the eighth 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 Fermium Element

Fermium
‣ What does fermium look like?

Appearance: silvery
‣ Who discovered fermium and in what year?

Discovery: Lawrence Berkeley National Laboratory (1952)
‣ Fermium location on periodic table

Fermium Periodic Table

Location: Fermium is found in the seventh row of the periodic table, next to the einsteinium element.
‣ What is fermium atomic mass number?

Atomic number (Z): 100
‣ Fermium symbol: Fm
‣ What is fermium atomic weight?

Standard atomic weight: [257]
‣ What block does fermium belong to?

Block: f-block
‣ What period is fermium on the periodic table?

Period: 7
‣ What is fermium melting point?

Melting point: 1800 K (1527 °C, 2781 °F) (predicted)
‣ How many electrons does fermium have?

Electrons per shell: 2, 8, 18, 32, 30, 8, 2
‣ Fermium electron configuration: [Rn] 5f12 7s2
‣ Fermium ionization energies:
1st: 629 kJ/mol
‣ What is the phase of fermium?

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

Density (near r.t): 9.7 g/cm3 (predicted)
‣ Fermium natural occurrence: synthetic
‣ Fermium oxidation state: +3
‣ Fermium electronegativity: Pauling scale: 1.3
‣ What is the crystal structure of fermium?

Crystal structure: face-centered cubic (fcc) (predicted)
‣ Fermium CAS number: 7440-72-4

‣ How many isotopes does fermium have?

Main isotopes of fermium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
252Fmsyn25.39 hSF
α		–
248Cf
253Fmsyn3 dε
α		253Es
249Cf
255Fmsyn20.07 hSF
α		–
251Cf
257Fmsyn100.5 dα
SF		253Cf
–

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