Mendelevium Element (Periodic Table)

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Mendelevium

Mendelevium (Md) is a chemical element of the periodic table, located in the period 7, and has the atomic number 101. It is the thirteenth element in the actinide series. It is a silvery-white metal which is named after the Russian chemist Dmitri Mendeleev. It is the ninth 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 Mendelevium Element

Mendelevium
‣ Who discovered mendelevium and in what year?

Discovery: Lawrence Berkeley National Laboratory (1955)
‣ Where is mendelevium found on the periodic table?

Mendelevium Periodic Table

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

Atomic number (Z): 101
‣ Mendelevium symbol: Md
‣ Mendelevium atomic weight: [258]
‣ What block is mendelevium in the periodic table?

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

Period: 7
‣ What’s the melting point of mendelevium?

Melting point: 1100 K (827 °C, 1521 °F) (predicted)
‣ How many electron shells does mendelevium have?

Electrons per shell: 2, 8, 18, 32, 31, 8, 2
‣ Mendelevium electron configuration: [Rn] 5f13 7s2
‣ Mendelevium ionization energies:1st: 636 kJ/mol
‣ What is the phase of mendelevium?

Phase (at r.t): solid (predicted)
‣ Mendelevium density (near r.t): 10.3 g/cm3 (predicted)
‣ Mendelevium natural occurrence: synthetic
‣ Mendelevium oxidation state: +2, +3
‣ Mendelevium electronegativity: Pauling scale: 1.3
‣ Mendelevium crystal structure: face-centered cubic (fcc) (predicted)
‣ Mendelevium CAS number: 7440-11-1

‣ How many isotopes does mendelevium have?

Main isotopes of mendelevium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
256Mdsyn1.17 hε256Fm
257Mdsyn5.52 hε
α
SF		257Fm
253Es
–
258Mdsyn51.5 dα
ε
β–		254Es
258Fm
258No
259Mdsyn1.60 hSF
α		–
255Es
260Mdsyn31.8 dSF
α
ε
β–		–
256Es
260Fm
260No

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