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Physical Properties of Polonium and Chromium

Polonium
Chromium
Physical Properties of Chromium and Polonium


Physical Properties
Melting Point
254.00 °C   
99+
1,857.00 °C   
14
Boiling Point
962.00 °C   
99+
2,672.00 °C   
39
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silver   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
8.50   
1
Brinell Hardness
Not Available   
687.00 MPa   
16
Vickers Hardness
Not Available   
1,060.00 MPa   
10
Speed of Sound
Not Available   
5,940.00 m/s   
5
Optical Properties
  
  
Allotropes
Yes   
No   
α Allotropes
α-polonium   
Not Available   
β Allotropes
β-polonium   
Not Available   
γ Allotropes
Not Available   
Not Available   
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