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Physical Properties of Sodium and Potassium

Sodium
Potassium
Physical Properties of Potassium and Sodium


Physical Properties
Melting Point
97.72 °C   
99+
63.65 °C   
99+
Boiling Point
883.00 °C   
99+
774.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery Gray   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
0.50   
22
0.40   
23
Brinell Hardness
0.69 MPa   
99+
0.36 MPa   
99+
Speed of Sound
3,200.00 m/s   
24
2,000.00 m/s   
99+
Optical Properties
  
  
Allotropes
No   
No   
α Allotropes
Not Available   
Not Available   
β Allotropes
Not Available   
Not Available   
γ Allotropes
Not Available   
Not Available   
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