Mendelevium Element (Periodic Table)

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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