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krom unsur
krom


Tabel périodik
Symbol
Cr
Panggil Group
6 12
Panggil periode
4 4
Block
d block
Family unsur
transisi Metal
CAS Number
7440473 39
Jeneng papan Group
3M Im_
Space Group Number
229.00 2
facts
Facts Interesting
  • Krom punika reaktif, Empu durung ketemu gratis ing alam.
  • Ores saka Chromites Mineral sing sumber utama saka logam Krom.
  • Meh 90% penyamakan kulit wis rampung karo bantuan saka krom.
sumber
Found in Minerals, Mining, Ores logam, Ores saka Minerals
History
sing katutup
Louis Nicolas Vauquelin
Discovery
Ing Antarane 1797 - 1798
turah mbrawah
Turah mbrawah Ing Universe
0.00 % 8
Turah mbrawah Ing Sun
0.00 % 7
Turah mbrawah Ing meteorit
0.30 % 7
Turah mbrawah Ing bumi lemah ndhuwur
0.01 % 13
Turah mbrawah Ing Segara
0.00 % 16
Turah mbrawah Ing Manungsa
0.00 % 19
ulah
Ulah lan Wuku
  • Iki digunakake kanggo harden baja lan mrodhuksi stainless steel lan macem-macem wesi liyane.
  • Iki uga digunakake kanggo menehi finish sing tepat kanggo mirrors polesan. Piring kromium digunakake ing perlengkapan jedhing.
Ulah Industrial
Industry automobile, Industri Kimia
Ulah Medical
-
Ulah liyane
wesi
Properties biologi
keracunan
Highly Toxic
Saiki ing badan Human
Ya
Sang
0.11 Sang / mg dm-3 12
ing Bone
0.33 ppm 25
fisik
leleh Point
1,857.00 ° C 14
Boiling Point
2,672.00 ° C 41
katon
State fisik
Solid
warna
Silver
luster
metallic
atose
Mohs atose
8.50 1
Brinell atose
687.00 MPa 18
Vickers atose
1,060.00 MPa 17
Kacepetan swara
5,940.00 m / s 8
Properties Optical
bias Index
2.97 2
reflectivity
70.00 % 13
allotropes
Ora
α allotropes
-
β allotropes
-
γ allotropes
-
Kimia
Formula Kimia
Cr
isotop
Isotop dikenal
21 18
keelektronegatifan
Pauling Elektronegativitas
1.66 19
Sanderson Elektronegativitas
1.66 17
Allred Rochow Elektronegativitas
1.56 11
Mulliken-Jaffe Elektronegativitas
1.66 19
Allen Elektronegativitas
1.65 22
Electropositivity
Pauling Electropositivity
2.34 36
tenogo ionisasi
Level Energy 1st
26,130.00 kJ / mol 1
Level Energy 2
28,750.00 kJ / mol 1
Level Energy 3rd
34,230.00 kJ / mol 1
Level Energy 4
37,066.00 kJ / mol 1
Level Energy 5th
97,510.00 kJ / mol 1
Level Energy 6th
105,800.00 kJ / mol 1
tingkat Energy 7
114,300.00 kJ / mol 1
Level Energy 8
125,300.00 kJ / mol 1
Level Energy 9
134,700.00 kJ / mol 1
Level Energy 10th
144,300.00 kJ / mol 1
Level Energy 11
26,130.00 kJ / mol 12
Level Energy 12
28,750.00 kJ / mol 36
Level Energy 13
34,230.00 kJ / mol 10
Level Energy 14
37,066.00 kJ / mol 12
Level Energy 15
97,510.00 kJ / mol 2
Level Energy 16
105,800.00 kJ / mol 2
Level Energy 17
114,300.00 kJ / mol 3
Level Energy 18
125,300.00 kJ / mol 4
Level Energy 19
134,700.00 kJ / mol 5
Level Energy 20
144,300.00 kJ / mol 7
Level Energy 21
157,700.00 kJ / mol 7
Level Energy 22
166,090.00 kJ / mol 6
Level Energy 23rd
653.80 kJ / mol 56
Level Energy 24
653.80 kJ / mol 32
Level Energy 25th
653.80 kJ / mol 34
Level Energy 26th
653.80 kJ / mol 33
Level Energy 27th
652.90 kJ / mol 34
Level Energy 28th
653.80 kJ / mol 39
Level Energy 29
653.80 kJ / mol 40
Level Energy 30
653.80 kJ / mol 36
padha karo elektrokimia
0.32 g / amp-day 77
Fungsi Work elektron
4.50 eV 19
Properties Kimia liyane
anti Corrosion, Kimia Stabilitas, ionisasi, Isotop radioaktif, kelarutan
atom
Panggil atom
24 82
Konfigurasi elektron
[Ar] 3d 5 4s 1
Struktur Crystal
Body tengah kubik (Bcc)
Crystal pola
BCC-Crystal-Structure-.jpg#100
atom
Jumlah proton
24 81
Jumlah Neutron
28 62
Jumlah Èlèktron
24 81
Radius saka Atom
Radius atom
128.00 pm 48
kovalen Radius
139.00 pm 47
Van der Waals Radius
200.00 pm 35
Bobot atom
52.00 Amu 76
Volume atom
7.23 cm3 / mol 78
Nomer atom jejer
unsur Previous
39
Sabanjure unsur
31
Potensi Valence Electron
170.00 (-eV) 4
Constant pola
291.00 pm 69
pola Angles
π/2, π/2, π/2
Pola C / A rasio
1.86 4
Teknik
Kapadhetan
Kapadhetan Ing suhu kamar
7.19 g / cm 3 63
Kapadhetan Nalika Liquid (ing mp)
6.30 g / cm3 69
Strength tensile
689.00 MPa 7
viskositas
0.00 23
meksa beluk
Meksa beluk ing 1000 K
0.00 (Pa) 26
Meksa beluk ing 2000 K
774.00 (Pa) 1
situs kelenturan
nyukur pengaturan
115.00 GPA 9
pengaturan akeh
160.00 GPA 11
Young kang pengaturan
279.00 GPA 8
Poisson rasio
0.21 33
Properties Teknik liyane
-
Magnetic
Ciri Magnetic
Gravitasi tartamtu
7.19 62
Nindakake Magnetic
Antiferromagnetic
permeabilitas
0.00 H / m 17
kelemahan
0.00 10
Properties Listrik
Property Listrik
-
resistivity
125.00 nΩ · m 27
konduktivitas listrik
0.08 10 6 / cm Ω 30
elektron Affinity
64.30 kJ / mol 17
termal
Kalor tartamtu
0.45 J / (kg K) 12
Graham Kapasitas kalor
23.35 J / mol · K 65
doyo termal
93.90 W / m · K 17
suhu kritis
1,907.00 K 24
Expansion termal
4.90 μm / (m · K) 72
enthalpy
Enthalpy panguapan
348.80 kJ / mol 35
Enthalpy saka Fusion
15.31 kJ / mol 20
Enthalpy saka atomization
397.50 kJ / mol 27
Standard molar Entropy
23.80 J / mol.K 74
Summary >>
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