• Explore SchoolMyKids in English

Md Mendelevium
Element Information, Facts, Properties, Trends, Uses, Comparison with other elements

101
Md
Mendelevium
Element 101 of Periodic table is Mendelevium with atomic number 101, atomic weight 258. Mendelevium, symbol Md, has a Face Centered Cubic structure and color. Mendelevium is a Actinide element. It is part of group null (). Know everything about Mendelevium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.

Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the Actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the antepenultimate Actinide and the ninth transuranic element.

It belongs to group null of the periodic table having trivial name . You can also download Printable Periodic Table of Elements Flashcards for Mendelevium in a PDF format.

Mendelevium Facts

Read key information and facts about element Mendelevium

NameMendelevium
Atomic Number101
Atomic SymbolMd
Atomic Weight258
PhaseSolid
Color-
Appearance-
ClassificationActinide
Natural OccuranceSynthetic
Group in Periodic Table-
Group Name
Period in Periodic Tableperiod 7
Block in Periodic Tablef-block
Electronic Configuration[Rn] 5f13 7s2
Electronic Shell Structure (Electrons per shell)2, 8, 18, 32, 31, 8, 2
Melting Point1100 K
Boiling Point-
CAS NumberCAS7440-11-1
Neighborhood Elements
123456789101112131415161718
1
1
H
Hydrogen
1.008

Atomic #

Electronic Shell #

Symbol
Name
Atomic Weight
HGas
HgLiquid
CSolid
Metals
Metalloids
NonMetals
Alkali metals
Alkali earth metals
Lanthanoids
Transition metals
Post-transition metals
Other nonmetals
Halogens
Nobel gas
Actinoids
2
He
Helium
4.003
2
3
Li
Lithium
6.941
4
Be
Beryllium
9.012
5
B
Boron
10.811
6
C
Carbon
12.011
7
N
Nitrogen
14.007
8
O
Oxygen
15.999
9
F
Fluorine
18.998
10
Ne
Neon
20.180
3
11
Na
Sodium
22.990
12
Mg
Magnesium
24.305
13
Al
Aluminium
26.982
14
Si
Silicon
28.085
15
P
Phosphorus
30.974
16
S
Sulfur
32.065
17
Cl
Chlorine
35.453
18
Ar
Argon
39.948
4
19
K
Potassium
39.098
20
Ca
Calcium
40.078
21
Sc
Scandium
44.956
22
Ti
Titanium
47.867
23
V
Vanadium
50.941
24
Cr
Chromium
51.996
25
Mn
Manganese
54.938
26
Fe
Iron
55.845
27
Co
Cobalt
58.933
28
Ni
Nickel
58.693
29
Cu
Copper
63.546
30
Zn
Zinc
65.409
31
Ga
Gallium
69.723
32
Ge
Germanium
72.640
33
As
Arsenic
74.922
34
Se
Selenium
78.960
35
Br
Bromine
79.904
36
Kr
Krypton
83.798
5
37
Rb
Rubidium
85.468
38
Sr
Strontium
87.620
39
Y
Yttrium
88.906
40
Zr
Zirconium
91.224
41
Nb
Niobium
92.906
42
Mo
Molybdenum
95.940
43
Tc
Technetium
98
44
Ru
Ruthenium
101.070
45
Rh
Rhodium
102.906
46
Pd
Palladium
106.420
47
Ag
Silver
107.868
48
Cd
Cadmium
112.411
49
In
Indium
114.818
50
Sn
Tin
118.710
51
Sb
Antimony
121.760
52
Te
Tellurium
127.600
53
I
Iodine
126.904
54
Xe
Xenon
131.293
6
55
Cs
Cesium
132.905
56
Ba
Barium
137.327
57 - 71
La - Lu
Lanthanides
72
Hf
Hafnium
178.490
73
Ta
Tantalum
180.948
74
W
Tungsten
183.840
75
Re
Rhenium
186.207
76
Os
Osmium
190.230
77
Ir
Iridium
192.217
78
Pt
Platinum
195.078
79
Au
Gold
196.967
80
Hg
Mercury
200.590
81
Tl
Thallium
204.383
82
Pb
Lead
207.200
83
Bi
Bismuth
208.980
84
Po
Polonium
209
85
At
Astatine
210
86
Rn
Radon
222
7
87
Fr
Francium
223
88
Ra
Radium
226
89 - 103
Ac - Lr
Actinides
104
Rf
Rutherfordium
261
105
Db
Dubnium
262
106
Sg
Seaborgium
266
107
Bh
Bohrium
264
108
Hs
Hassium
269
109
Mt
Meitnerium
268
110
Ds
Darmstadtium
281
111
Rg
Roentgenium
272
112
Cn
Copernicium
285
113
Nh
Nihonium
284
114
Fl
Flerovium
289
115
Mc
Moscovium
288
116
Lv
Livermorium
292
117
Ts
Tennessine
294
118
Og
Oganesson
294
Lanthanides
57
La
Lanthanum
138.905
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.908
60
Nd
Neodymium
144.240
61
Pm
Promethium
145
62
Sm
Samarium
150.360
63
Eu
Europium
151.964
64
Gd
Gadolinium
157.250
65
Tb
Terbium
158.925
66
Dy
Dysprosium
162.500
67
Ho
Holmium
164.930
68
Er
Erbium
167.259
69
Tm
Thulium
168.934
70
Yb
Ytterbium
173.040
71
Lu
Lutetium
174.967
Actinides
89
Ac
Actinium
227
90
Th
Thorium
232.038
91
Pa
Protactinium
231.036
92
U
Uranium
238.029
93
Np
Neptunium
237
94
Pu
Plutonium
244
95
Am
Americium
243
96
Cm
Curium
247
97
Bk
Berkelium
247
98
Cf
Californium
251
99
Es
Einsteinium
252
100
Fm
Fermium
257
101
Md
Mendelevium
258
102
No
Nobelium
259
103
Lr
Lawrencium
262

How to Locate Mendelevium on Periodic Table

Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of electrons. The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and ends at bottom right (atomic number 118). Therefore you can directly look for atomic number 101 to find Mendelevium on periodic table.

Another way to read periodic table and locate an element is by using group number (column) and period number (row). To locate Mendelevium on periodic table look for cross section of group - and period 7 in the modern periodic table.

Mendelevium History

The element Mendelevium was discovered by A. Ghiorso,G. Harvey,R. Choppin, S. G. Thompson and G. T. Seaborg in year 1955 in United States. Mendelevium was first isolated by in . Mendelevium derived its name from Dmitri Mendeleev, chemist and inventor.

Discovered By A. Ghiorso,G. Harvey,R. Choppin, S. G. Thompson and G. T. Seaborg
Discovery Date 1955 in United States
First Isolation
Isolated by

Prepared by bombardment of einsteinium with helium.

Mendelevium Uses

The element Mendelevium has No uses outside scientific research. Since element Mendelevium has extremely short half-lives

Mendelevium Presence: Abundance in Nature and Around Us

As Mendelevium is a Synthetic element, the abundance of Mendelevium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body in either not known or they have a very short half life.

Crystal Structure of Mendelevium

The solid state structure of Mendelevium is Face Centered Cubic.

The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in three dimensional space to form the structure.

Unit Cell Parameters

The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges Lattice Constants (a, b and c)

abc

and the angles between them Lattice Angles (alpha, beta and gamma).

alphabetagamma

The positions of the atoms inside the unit cell are described by the set of atomic positions ( xi, yi, zi) measured from a reference lattice point.

The symmetry properties of the crystal are described by the concept of space groups. All possible symmetric arrangements of particles in three-dimensional space are described by the 230 space groups (219 distinct types, or 230 if chiral copies are considered distinct.

Space Group Name-
Space Group Number-
Crystal StructureFace Centered Cubic
Number of atoms per unit cell4
101 Md Mendelevium - Crystal Structure | SchoolMyKids

The number of atoms per unit cell in a simple cubic, face-centered cubic and body-centred cubic are 1,4,2 respectively.

Mendelevium Atomic and Orbital Properties

Mendelevium atoms have 101 electrons and the electronic shell structure is [2, 8, 18, 32, 31, 8, 2] with Atomic Term Symbol (Quantum Numbers) 2F7/2.

Atomic Number101
Number of Electrons (with no charge)101
Number of Protons101
Mass Number258
Number of Neutrons157
Shell structure (Electrons per energy level)2, 8, 18, 32, 31, 8, 2
Electron Configuration[Rn] 5f13 7s2
Valence Electrons5f13 7s2
Valence (Valency)3
Main Oxidation States3
Oxidation States2, 3
Atomic Term Symbol (Quantum Numbers)2F7/2

Bohr Atomic Model of Mendelevium - Electrons per energy level

101 Md Mendelevium Electron Shell Structure | SchoolMyKids
nspdf

Ground State Electronic Configuration of Mendelevium - neutral Mendelevium atom

Abbreviated electronic configuration of Mendelevium

The ground state abbreviated electronic configuration of Neutral Mendelevium atom is [Rn] 5f13 7s2. The portion of Mendelevium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Rn]. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. This is important as it is the Valence electrons 5f13 7s2, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Mendelevium

Complete ground state electronic configuration for the Mendelevium atom, Unabbreviated electronic configuration

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f13 7s2

Electrons are filled in atomic orbitals as per the order determined by the Aufbau principle, Pauli Exclusion Principle and Hund’s Rule.

  • As per the Aufbau principle the electrons will occupy the orbitals having lower energies before occupying higher energy orbitals. According to this principle, electrons are filled in the following order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p…
  • The Pauli exclusion principle states that a maximum of two electrons, each having opposite spins, can fit in an orbital.
  • Hund's rule states that every orbital in a given subshell is singly occupied by electrons before a second electron is filled in an orbital.
  • Electron configuration of Mendelevium
    Atomic Structure of Mendelevium

    Mendelevium atomic radius is -, while it's covalent radius is -.

    Atomic Radius Calculated

    -

    Atomic Radius Empirical

    -

    Atomic Volume-
    Covalent Radius-
    Van der Waals Radius-
    Neutron Cross Section-
    Neutron Mass Absorption -

    Spectral Lines of Mendelevium - Atomic Spectrum of Mendelevium

    A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from an excess or deficiency of photons in a narrow frequency range, compared with the nearby frequencies. Spectral lines are often used to identify atoms and molecules.

    Spectral lines are the result of interaction between a quantum system and a single photon. A spectral line may be observed either as an emission line or an absorption line.

    Spectral lines are highly atom-specific, and can be used to identify the chemical composition of any medium. Several elements, including helium, thallium, and caesium, were discovered by spectroscopic means. They are widely used to determine the physical conditions of stars and other celestial bodies that cannot be analyzed by other means.

    Emission spectrum of Mendelevium

    Emission spectrum of Mendelevium is not available

    Absorption spectrum of Mendelevium

    Absorption spectrum of Mendelevium is not available

    Mendelevium Chemical Properties: Mendelevium Ionization Energies and electron affinity

    The electron affinity of Mendelevium is -.

    Valence3
    Electronegativity1.3
    ElectronAffinity-

    Ionization Energy of Mendelevium

    Ionization energy is the amount of energy required to remove an electron from an atom or molecule.in chemistry, this energy is expresed in kilocalories per mole (kcal/mol) or kilojoules per mole (kJ/mol).

    Refer to table below for Ionization energies of Mendelevium

    Ionization energy numberEnthalpy - kJ/mol
    1st635

    Mendelevium Physical Properties

    Refer to below table for Mendelevium Physical Properties

    Density-
    Molar Volume-

    Elastic Properties

    Young Modulus-
    Shear Modulus-
    Bulk Modulus -
    Poisson Ratio-

    Hardness of Mendelevium - Tests to Measure of Hardness of Element

    Mohs Hardness-
    Vickers Hardness-
    Brinell Hardness-

    Mendelevium Electrical Properties

    Electrical resistivity measures element's electrical resistance or how strongly it resists electric current.The SI unit of electrical resistivity is the ohm-metre (Ω⋅m). While Electrical conductivity is the reciprocal of electrical resistivity. It represents a element's ability to conduct electric current. The SI unit of electrical conductivity is siemens per metre (S/m).

    Mendelevium is a -. Refer to table below for the Electrical properties of Mendelevium

    Electrical conductors -
    Electrical Conductivity-
    Resistivity-
    Superconducting Point-

    Mendelevium Heat and Conduction Properties

    Thermal Conductivity-
    Thermal Expansion-

    Mendelevium Magnetic Properties

    Magnetic Type-
    Curie Point-
    Mass Magnetic Susceptibility-
    Molar Magnetic Susceptibility-
    Volume Magnetic Susceptibility-

    Optical Properties of Mendelevium

    Refractive Index-

    Acoustic Properties of Mendelevium

    Speed of Sound-

    Mendelevium Thermal Properties - Enthalpies and thermodynamics

    Refer to table below for Thermal properties of Mendelevium

    Melting Point1100 K(826.85 °C, 1520.330 °F)
    Boiling Point-
    Critical Temperature-
    Superconducting Point-

    Enthalpies of Mendelevium

    Heat of Fusion-
    Heat of Vaporization-
    Heat of Combustion-

    Mendelevium Isotopes - Nuclear Properties of Mendelevium

    Mendelevium has 18 isotopes, with between 245 and 262 nucleons. Mendelevium has 0 stable naturally occuring isotopes.

    Isotopes of Mendelevium - Naturally occurring stable Isotopes: -.

    IsotopeZNIsotope Mass% AbundanceT halfDecay Mode
    245Md101144245Synthetic
    246Md101145246Synthetic
    247Md101146247Synthetic
    248Md101147248Synthetic
    249Md101148249Synthetic
    250Md101149250Synthetic
    251Md101150251Synthetic
    252Md101151252Synthetic
    253Md101152253Synthetic
    254Md101153254Synthetic
    255Md101154255Synthetic
    256Md101155256Synthetic
    257Md101156257Synthetic
    258Md101157258Synthetic51.5 dAlphaEmission
    259Md101158259Synthetic
    260Md101159260Synthetic
    261Md101160261Synthetic
    262Md101161262Synthetic

    Regulatory and Health - Health and Safety Parameters and Guidelines

    The United States Department of Transportation (DOT) identifies hazard class of all dangerous elements/goods/commodities either by its class (or division) number or name. The DOT has divided these materials into nine different categories, known as Hazard Classes.

    NFPA 704 is a Standard System for the Identification of the Hazards of Materials for Emergency Response. NFPA is a standard maintained by the US based National Fire Protection Association.

    The health (blue), flammability (red), and reactivity (yellow) rating all use a numbering scale ranging from 0 to 4. A value of zero means that the element poses no hazard; a rating of four indicates extreme danger.

    Autoignition Point-
    Flashpoint-

    Database Search

    List of unique identifiers to search the element in various chemical registry databases

    DatabaseIdentifier number
    CAS Number - Chemical Abstracts Service (CAS)CAS7440-11-1
    RTECS Number-
    CID Number -
    Gmelin Number-
    NSC Number-

    Compare Mendelevium with other elements

    Compare Mendelevium with all Group elements

    Compare Mendelevium with all Period 7 elements

    Compare Mendelevium with all Actinide elements

    FAQs

    What is the electronic configuration of Mendelevium?

    The electronic configuration of Mendelevium is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f13 7s2.

    What is the abbreviated electronic configuration of Mendelevium?

    The abbreviated electronic configuration of Mendelevium is [Rn] 5f13 7s2. To form abbreviated notation of electronic configuration, the completely filled subshells are replaced by the noble gas of the preceding period in square brackets.

    What is the symbol of Mendelevium?

    Symbol of Mendelevium is Md. Mendelevium is a chemical element with symbol Md and atomic number 101.

    What is the position of Mendelevium in the Periodic Table?

    Mendelevium is a chemical element with the symbol Md and atomic number 101. Mendelevium is the 101 element on the periodic table. It is located in group null and period 7 in the modern periodic table.

    What is the atomic number of Mendelevium?

    The atomic number of Mendelevium is 101.

    What is the color of Mendelevium?

    Mendelevium is of color.

    Who discovered Mendelevium?

    The element Mendelevium was discovered by A. Ghiorso,G. Harvey,R. Choppin, S. G. Thompson and G. T. Seaborg in year 1955 in United States. Mendelevium was first isolated by undefined in undefined.

    How many valence electrons does a Mendelevium atom have?

    Mendelevium has 3 valence electrons. Mendelevium has 101 electrons out of which 3 valence electrons are present in the 5f13 7s2 outer orbitals of atom.

    What is the melting Point of Mendelevium?

    Melting Point of Mendelevium is 1100 K.

    What is the boiling Point of Mendelevium?

    Boiling Point of Mendelevium is Unknown.

    What is the melting Point of Mendelevium in Kelvin?

    Melting Point of Mendelevium in Kelvin is 1100 K.

    What is the boiling Point of Mendelevium in Kelvin?

    Boiling Point of Mendelevium in Kelvin is Unknown.

    What is the melting Point of Mendelevium in Celsius?

    Melting Point of Mendelevium in Celsius is 826.85 °C.

    What is the boiling Point of Mendelevium in Celsius?

    Boiling Point of Mendelevium in Celsius is Unknown.

    What is the melting Point of Mendelevium in Fahrenheit?

    Melting Point of Mendelevium in Fahrenheit is 1520.33 °F.

    What is the boiling Point of Mendelevium in Fahrenheit?

    Boiling Point of Mendelevium in Fahrenheit is Unknown.

    What is the electronic configuration of Mendelevium 101?

    The electronic configuration of Mendelevium will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f13 7s2.

    How do you write the electron configuration for Mendelevium?

    The electronic configuration of Mendelevium will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f13 7s2.