aspect 27 of regular table is Cobalt with atomic number 27, atomic weight 58.9332. Cobalt, symbol Co, has actually a an easy Hexagonal structure and Gray color. Cobalt is a change metal element. Understand everything around Cobalt Facts, physical Properties, chemistry Properties, digital configuration, Atomic and Crystal Structure.


Cobalt is a chemical element with prize Co and atomic number 27. Choose nickel, cobalt in the Earth"s late is discovered only in chemically combined form, save for small deposits discovered in alloys of natural meteoric iron. The totally free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.

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Cobalt Facts

Read crucial information and also facts around element Cobalt

surname Cobalt
atom Number 27
atomic Symbol Co
Atomic load 58.9332
phase Solid
color Gray
Classification transition metal
group in periodic Table 9
Group Name cobalt family
period in regular Table 4
Block in regular Table d-block
Electronic Configuration 3d7 4s2
Melting suggest 1495 °C
Boiling suggest 2927 °C
Electronic covering Structure <2, 8, 15, 2>
CAS Number CAS7440-48-4

How to situate Cobalt on regular Table

Periodic table is arranged by atomic number, variety of protons in the nucleus i m sorry is very same as variety of electrons. The atomic number rises from left to right. Regular table starts at top left ( atom number 1) and also ends at bottom best (atomic number 118). Because of this you can directly look for atomic number 27 to discover Cobalt on regular table.

Another method to read routine table and locate an facet is by using group number (column) and duration number (row). To find Cobalt on regular table look because that cross section of team 9 and duration 4 in the modern periodic table.

check out Interactive regular Table to Understand and Learn Cool trends

Table of Contents

Physical Properties
Thermal Properties
Crystal Structure
Atomic & orbital Properties
Chemical Properties
Health and also Safety Parameters and also Guidelines
Compare Cobalt with various other elements

Cobalt History

The aspect Cobalt was uncovered by Georg Brandt in year 1735 in Sweden . Cobalt acquired its name from the German indigenous Kobold, definition "goblin"

Cobalt Presence: variety in Nature and Around Us

The table below shows the diversity of Cobalt in Universe, Sun, Meteorites, Earth"s Crust, Oceans and also Human Body.

Ppb by weight (1ppb =10^-7 %)
abundance in cosmos 3e-06
abundance in sunlight 4e-06
abundance in Meteorites 0.00059
Abundance in Earth"s crust 3e-05
abundance in oceans 8×10-9%
diversity in human beings 2×10-6%

Crystal framework of Cobalt

The hard state structure of Cobalt is Simple Hexagonal.

The decision structure have the right to be defined in regards to its unit Cell. The unit cells repeats chin in 3 dimensional room to form the structure.

Unit cabinet Parameters

The unit cabinet is stood for in terms of its lattice parameters, which are the lengths that the cabinet edges Lattice Constants (a, b and c)

a b c
250.71 250.71 406.95 pm

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

alpha beta gamma
π/2 π/2 2 π/3

The location of the atoms within the unit cabinet are defined by the collection of atom positions ( xi, yi, zi) measured native a recommendation lattice point.

The symmetry nature of the decision are described by the concept of room groups. All feasible symmetric kinds of particles in three-dimensional an are are defined by the 230 an are groups (219 distinct types, or 230 if chiral copies are considered distinct.

an are Group surname P63/mmc
space Group Number 194
Crystal structure Simple Hexagonal

Cobalt Atomic and also Orbital Properties

Cobalt atoms have actually 27 electrons and also the electronic shell framework is <2, 8, 15, 2> through Atomic ax Symbol (Quantum Numbers) 4F9/2.

atom Number 27
Number of electron (with no charge) 27
Number that Protons 27
Mass Number 59
Number that Neutrons 32
Shell structure (Electrons per energy level) <2, 8, 15, 2>
Electron construction 3d7 4s2
Valence Electrons 3d7 4s2
Oxidation State -3;-1 1;2;3;4;5
Atomic ax Symbol (Quantum Numbers) 4F9/2

Shell structure of Cobalt - electron per power level


Ground State electronic Configuration the Cobalt - neutral Cobalt atom

The floor state electronic configuration that Neutral Cobalt atom is 3d7 4s2. The section of Cobalt configuration the is tantamount to the noble gas of the coming before period, is abbreviated as . For atoms with many electrons, this notation have the right to become lengthy and therefore an abbreviated notation is used.This is essential as that is the Valence electron 3d7 4s2, electron in the outermost covering that recognize the chemistry properties of the element.

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Unabbreviated electronic configuration that neutral Cobalt

Complete floor state electronic configuration because that the Cobalt atom, Unabbreviated digital configuration

1s2 2s2 2p6 3s2 3p6 3d7 4s2

Atomic framework of Cobalt

Cobalt atom radius is 152 pm, when it"s covalent radius is 126 pm.

atom Radius

152 pm (1.52 Å)

Atomic Volume 6.62170786517 cm3
Covalent Radius 126 pm (1.26 Å)
van der Waals Radius N/A
spirit Cross ar 37.2 σa/barns

Atomic Spectrum the Cobalt


Cobalt chemical Properties: Cobalt Ionization Energies and electron affinity

The electron affinity that Cobalt is 63.7 kJ/mol

Valence 4
Electronegativity 1.88
ElectronAffinity 63.7 kJ/mol

Ionization power of Cobalt

Refer to table below for Ionization energies the Cobalt

Ionization energy number Enthalpy - kJ/mol
1 760.4
2 1648
3 3232
4 4950
5 7670
6 9840
7 12440
8 15230
9 17959
10 26570
11 2.94×104
12 3.24×104
13 3.66×104
14 3.97×104
15 4.28×104
16 49396
17 52737
18 134810
19 145170
20 1.547×105
21 1.674×105

Cobalt physical Properties

Refer to listed below table for Cobalt physics Properties

density 8.9 g/cm3
Molar Volume 6.62170786517 cm3

Elastic Properties

Young Modulus 209 GPa
Shear Modulus 75 GPa
bulk Modulus 180 GPa
Poisson ratio 0.31

Hardness of Cobalt - tests to measure of Hardness of Element

Mohs Hardness 5 MPa
Vickers Hardness 1043 MPa
Brinell Hardness 700 MPa

Cobalt electric Properties

Cobalt is Conductor of electricity. Refer to table listed below for the electrical properties the Cobalt

electrical Conductivity 1.7×107 S/m
Resistivity 6×10-8 m Ω
Superconducting allude N/A

Cobalt Heat and also Conduction Properties

heat Conductivity 100 W/(m K)
Thermal expansion 0.000013 K-1

Cobalt Magnetic Properties

Magnetic kind Ferromagnetic
Curie point 1394 K
mass Magnetic Susceptibility N/A
Molar Magnetic Susceptibility N/A
Volume Magnetic Susceptibility N/A

Optical properties of Cobalt

Refractive table of contents N/A

Acoustic properties of Cobalt

speed of Sound 4720 m/s

Cobalt thermal Properties - Enthalpies and also thermodynamics

Refer to table listed below for heat properties the Cobalt

Melting suggest 1768 K (1495 °C)
Boiling allude 3.2×103 K (2927 °C)
critical Temperature N/A
Superconducting point N/A

Enthalpies the Cobalt

warm of blend 16.2 kJ/mol
warmth of Vaporization 375 kJ/mol
warm of burning N/A

Cobalt isotopes - nuclear Properties of Cobalt

Isotopes that rhodium. Naturally occurring Cobalt has 1 steady isotope - 59Co.

Isotope Isotope fixed % variety T half Decay mode
59Co 100% secure N/A

Regulatory and Health - Health and Safety Parameters and also Guidelines

CAS Number CAS7440-48-4
RTECS Number RTECSGF8750000
period Hazard class 4.1
period Numbers 3089
EU Number N/A
NFPA Fire Rating N/A
NFPA dangers N/A
NFPA wellness Rating N/A
NFPA Reactivity Rating N/A
Autoignition suggest N/A
Flashpoint N/A

Database Search

perform of unique identifiers to search the facet in miscellaneous chemical registry databases

Database i would number
CAS Number - chemistry Abstracts business (CAS) CAS7440-48-4
CID Number CID104730
Gmelin Number N/A
NSC Number N/A
RTECS Number RTECSGF8750000

Compare Cobalt through all Group 9 elements

Cobalt vs Rhodium Cobalt vs Iridium Cobalt vs Meitnerium

Compare Cobalt through all transition metal elements

Cobalt vs Scandium Cobalt vs Titanium Cobalt vs Vanadium Cobalt vs Chromium Cobalt vs Manganese Cobalt vs iron Cobalt vs Nickel Cobalt vs Copper Cobalt vs Zinc Cobalt vs Yttrium Cobalt vs Zirconium Cobalt vs Niobium Cobalt vs Molybdenum Cobalt vs Technetium Cobalt vs Ruthenium Cobalt vs Rhodium Cobalt vs Palladium Cobalt vs silver- Cobalt vs Cadmium Cobalt vs Hafnium Cobalt vs Tantalum Cobalt vs Tungsten Cobalt vs Rhenium Cobalt vs Osmium Cobalt vs Iridium Cobalt vs Platinum Cobalt vs gold Cobalt vs Mercury Cobalt vs Rutherfordium Cobalt vs Dubnium Cobalt vs Seaborgium Cobalt vs Bohrium Cobalt vs Hassium Cobalt vs Meitnerium Cobalt vs Darmstadtium Cobalt vs Roentgenium Cobalt vs Copernicium