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Protactinium

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Chromium

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Protactinium

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Chromium

Physical Properties of Protactinium and Chromium

Protactinium Electron Configuration

Protactinium

Chromium Metal

Chromium

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1 Physical

1.1 Melting Point

1,568.00 °C1,857.00 °C

27 3410

1.2 Boiling Point

4,027.00 °C2,672.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silver

Silver

1.3.3 Luster

Metallic

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

NA8.50

0.2 8.5

1.4.2 Brinell Hardness

NA687.00 MPa

0.14 3490

1.4.3 Vickers Hardness

NA1,060.00 MPa

121 3430

1.5 Speed of Sound

NA5,940.00 m/s

818 16200

1.6 Optical Properties

1.6.1 Refractive Index

NANA

1.000933 1.7229

1.6.2 Reflectivity

NANA

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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