Fermium Element (Periodic Table)

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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