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Airn,
26
Fe
Airn
Appearance
lustrous metallic wi a grayish tinge
Standard atomic weight
r,
std
(Fe)
7001558450000000000♠
55.845(2)
Airn in the
periodic cairt
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminium
Silicon
Phosphorus
Sulfur
Chlorine
Argon
Potassium
Calcium
Scandium
Titanium
Vanadium
Chromium
Manganese
Airn
Cobalt
Nickel
Capper
Zinc
Gallium
Germanium
Arsenic
Selenium
Bromine
Krypton
Rubidium
Strontium
Yttrium
Zirconium
Niobium
Molybdenum
Technetium
Ruthenium
Rhodium
Palladium
Siller (element)
Cadmium
Indium
Tin
Antimony
Tellurium
Iodine
Xenon
Caesium
Barium
Lanthanum
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Hafnium
Tantalum
Tungsten
Rhenium
Osmium
Iridium
Platinum
Gowd
Mercur (element)
Thallium
Leid (element)
Bismuth
Polonium
Astatine
Radon
Francium
Radium
Actinium
Thorium
Protactinium
Uranium
Neptunium
Plutonium
Americium
Curium
Berkelium
Californium
Einsteinium
Fermium
Mendelevium
Nobelium
Lawrencium
Rutherfordium
Dubnium
Seaborgium
Bohrium
Hassium
Meitnerium
Darmstadtium
Roentgenium
Copernicium
Ununtrium
Flerovium
Ununpentium
Livermorium
Ununseptium
Ununoctium
Fe
Ru
manganese
airn
cobalt
Atomic nummer
26
Group
group
Period
period
Block
d-block
Element category
Transeetion metal
Electron confeeguration
Ar
3d
4s
Electrons per shell
2, 8, 14, 2
Pheesical properties
Phase
at
STP
solit
Meltin
pynt
1811
(1538
°C,
2800
°F)
Bylin
pynt
3134
(2862
°C,
5182
°F)
Density
(near
r.t.
7.874
g/cm
when
liquid (at
m.p.
6.98
g/cm
Heat
fusion
13.81
kJ/mol
Heat o vapourisation
340
kJ/mol
Molar heat capacity
25.10
J/(mol·K)
Vapour
pressur
(Pa)
10
100
10
100
at
(K)
1728
1890
2091
2346
2679
3132
Atomic properties
Oxidation states
−4, −2, −1, 0, +1,
+2
+3
, +4, +5,
+6
, +7
(an
amphoteric
oxide)
Electronegativity
Pauling
scale: 1.83
Ionisation energies
more
Atomic radius
empirical:
126
pm
Covalent radius
132±3 (law spin), 152±6 (heich spin)
pm
Colour lines in a spectral range
Spectral lines
o airn
Ither properties
Naitural occurrence
primordial
Creestal structur
body-centred
cubic
(bcc)
=286.65 pm;
Speed o soond
thin
rod
(electrolytic)
5120
m/s
(at
r.t.
Thermal expansion
11.8
µm/(m·K)
(at
25
°C)
Thermal conductivity
80.4
W/(m·K)
Electrical resistivity
96.1 n
Ω·m
(at
20
°C)
Magnetic orderin
ferromagnetic
Young's modulus
211
GPa
Shear modulus
82
GPa
Bulk modulus
170
GPa
Poisson ratio
0.29
Mohs haurdness
Vickers haurdness
608
MPa
Brinell haurdness
490
MPa
CAS Nummer
7439-89-6
History
Diskivery
afore
5000 BC
Main
isotopes o airn
Iso
tope
Abun
dance
Hauf-life
1/2
Decay mode
Pro
duct
54
Fe
5.8%
>3.1
10
22
54
Cr
55
Fe
syn
2.73 y
55
Mn
56
Fe
91.72%
stable
57
Fe
2.2%
stable
58
Fe
0.28%
stable
59
Fe
syn
44.503 d
59
Co
60
Fe
syn
2.6
10
60
Co
Decay modes in parentheses are predictit, but hae nae yet been observed
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talk
edit
references
Airn
is a
chemical
element
in the periodic cairt that haes the symbol
Fe
(L.:
Ferrum
) an atomic nummer 26. Airn is a group 8 an period 4
Metal
. Airn is kent for bein the last element made bi stellar nucleosynthesis, an sicweys the maist wechtie element that disna require a supernova or seemilar catacleesmic event for tae be formed. It is, tharefore, the maist rowthie wechtie metal in the universe.
References
eedit
edit soorce
Meija, Juris; et al. (2016).
"Atomic weights of the elements 2013 (IUPAC Technical Report)"
Pure and Applied Chemistry
88
(3): 265–91.
doi
10.1515/pac-2015-0305
Ram, R. S. & Bernath, P. F. (2003).
"Fourier transform emission spectroscopy of the g
Δ-a
Δ system of FeCl"
(PDF)
Journal of Molecular Spectroscopy
221
(2): 261.
Bibcode
2003JMoSp.221..261R
doi
10.1016/S0022-2852(03)00225-X
Demazeau, G.; Buffat, B.; Pouchard, M.; Hagenmuller, P. (1982). "Recent developments in the field of high oxidation states of transition elements in oxides stabilization of Six-coordinated Iron(V)".
Zeitschrift für anorganische und allgemeine Chemie
491
: 60–66.
doi
10.1002/zaac.19824910109
Lu, J.; Jian, J.; Huang, W.; Lin, H.; Li, J; Zhou, M. (2016). "Experimental and theoretical identification of the Fe(VII) oxidation state in FeO4−".
Physical Chemistry Chemical Physics
18
(45): 31125–31131.
Bibcode
2016PCCP...1831125L
doi
10.1039/C6CP06753K
PMID
27812577
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