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Promethium
Promethium
☒

Yttrium
Yttrium
☒



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Promethium
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Yttrium

Physical Properties of Promethium and Yttrium
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1 Physical
1.1 Melting Point
1,042.00 °C1,523.00 °C
Physical Properties of Francium ▶ ⊕
27 3410
1.2 Boiling Point
3,000.00 °C3,337.00 °C
Physical Properties of Flerovium ▶ ⊕
147 5660
1.3 Appearance
1.3.1 Physical State
Solid
Solid
1.3.2 Color
Unknown
Silvery White
1.3.3 Luster
Metallic
NA
1.4 Hardness
1.4.1 Mohs Hardness
NANA
Physical Properties of Cesium ▶ ⊕
0.2 8.5
1.4.2 Brinell Hardness
NA589.00 MPa
Physical Properties of Cesium ▶ ⊕
0.14 3490
1.4.3 Vickers Hardness
NANA
Physical Properties of Palladium ▶ ⊕
121 3430
1.5 Speed of Sound
NA3,300.00 m/s
Physical Properties of Thallium ▶ ⊕
818 16200
1.6 Optical Properties
1.6.1 Refractive Index
NANA
Physical Properties of Mercury ▶ ⊕
1.000933 1.7229
1.6.2 Reflectivity
NANA
Physical Properties of Molybdenum ▶ ⊕
58 97
1.7 Allotropes
✔ ✘
✔ ✘
1.7.1 α Allotropes
Not Available
Not Available
1.7.2 β Allotropes
Not Available
Not Available
1.7.3 γ Allotropes
Not Available
Not Available

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