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 Atomic No. Order:
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 Alphabetic Order:
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Periodic Table

 

 

 

 

  Cr
24		Mo
42		  W
74		Sg
106		Uph
156		Bnh
206

Chromium

SymbolCr
Atomic Number24
Relative Atomic Mass
12C = 12.0000		51.9961  (±6) [Since 1983]
Atomic Radius  pm125
First Ionisation Energy
kJ mol -1		652.7
Ionisation Energy (eV) 6.7665
Electronegativity1.66
Density
kg m -3		7190 [293 K]
6460 [m.p.]
Molar Volume cm 37.23
Thermal Conductivity
W m -1 K -1		93.7 [300 K]
Melting Point K2130 ± 20
Boiling Point K2945
Number of Isotopes13
Isotope Atomic mass/u Mole fraction50Cr 49.946 0495(14) 0.043 45(13)
52Cr 51.940 5115(15) 0.837 89(18)
53Cr 52.940 6534(15) 0.095 01(17)
54Cr 53.938 8846(15) 0.023 65(7)
 
Inner + outer Shells
  2  +  2   =4
Inner + outer Orbitals
  10  +  14   =24
  

???

  Algorythm of Software
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  2, 8,  

  13, 1  

  2, 8,  

  12, 2  

Filling Orbital
  3d 5   
  3d 4   
Ground State Electron Configuration
[Ar]  3d 5   4s 1 
Ar]  3d 4   4s 2 
 
Ground State Electron Configuration with free Orbitals (n=12 )

  0, 0, 5, 7  

  0, 0, 6, 6  

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Ground State Electron Configuration with compressed Orbitals (n= 24)

  0, 0, 0, 24  

  0, 0, 0, 24  

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Singularity
60= 10+14+12+24
 
 spd fghij
12       
2

2

6      
3

2

646     
42 6 1014    
5        
6        
7        
  
Term Symbol7S 3
DiscoveryIt was discovered in 1797 by the French chemist and pharmacist Nicolas-Louis Vauquelin (Paris, France), who also isolated chromium in 1798.
 
Name Derived FromThe name derives from the Greek chroma for "color", from the many colored compounds of chromium. 
 

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APSIDIUM  ©  Created:    

2002- 06-01

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2004-12-08