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Promethium

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Silver

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Promethium

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Silver

Physical Properties of Promethium and Silver

Promethium Electron Configuration

Promethium

Silver Metal

Silver

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1 Physical

1.1 Melting Point

1,042.00 °C961.93 °C

27 3410

2.2 Boiling Point

3,000.00 °C2,212.00 °C

147 5660

2.3 Appearance

2.3.1 Physical State

Solid

Solid

2.3.2 Color

Unknown

Silvery White

2.3.3 Luster

Metallic

Metallic

2.5 Hardness

2.5.1 Mohs Hardness

NA2.50

0.2 8.5

2.5.4 Brinell Hardness

NA251.00 MPa

0.14 3490

2.5.6 Vickers Hardness

NA229.00 MPa

121 3430

3.2 Speed of Sound

NA2,680.00 m/s

818 16200

3.4 Optical Properties

3.4.1 Refractive Index

NANA

1.000933 1.7229

3.5.1 Reflectivity

NA97.00 %

58 97

3.6 Allotropes

✔ ✘

✔ ✘

3.7.1 α Allotropes

Not Available

Not Available

3.7.2 β Allotropes

Not Available

Not Available

3.7.3 γ Allotropes

Not Available

Not Available

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