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Praseodymium
Praseodymium
☒

Thorium
Thorium
☒



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Praseodymium
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Thorium

Physical Properties of Praseodymium and Thorium
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1 Physical
1.1 Melting Point
935.00 °C1,750.00 °C
Physical Properties of Francium ▶ ⊕
27 3410
1.3 Boiling Point
3,130.00 °C4,790.00 °C
Physical Properties of Flerovium ▶ ⊕
147 5660
1.4 Appearance
1.4.1 Physical State
Solid
Solid
1.4.2 Color
Grayish White
Silver
1.4.3 Luster
Metallic
NA
1.5 Hardness
1.5.1 Mohs Hardness
NA3.00
Physical Properties of Cesium ▶ ⊕
0.2 8.5
1.5.2 Brinell Hardness
481.00 MPa390.00 MPa
Physical Properties of Cesium ▶ ⊕
0.14 3490
1.5.3 Vickers Hardness
400.00 MPa295.00 MPa
Physical Properties of Palladium ▶ ⊕
121 3430
1.6 Speed of Sound
2,280.00 m/s2,490.00 m/s
Physical Properties of Thallium ▶ ⊕
818 16200
1.7 Optical Properties
1.7.1 Refractive Index
NANA
Physical Properties of Mercury ▶ ⊕
1.000933 1.7229
1.7.2 Reflectivity
NANA
Physical Properties of Molybdenum ▶ ⊕
58 97
1.8 Allotropes
✔ ✘
✔ ✘
1.8.1 α Allotropes
Not Available
Not Available
1.8.2 β Allotropes
Not Available
Not Available
1.8.3 γ Allotropes
Not Available
Not Available

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