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Chromium

☒

Technetium

☒

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Chromium

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Technetium

Physical Properties of Chromium and Technetium

Chromium Metal

Chromium

Technetium Metal

Technetium

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1 Physical

1.1 Melting Point

1,857.00 °C2,200.00 °C

27 3410

1.2 Boiling Point

2,672.00 °C4,877.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silver

Shiny Gray

1.3.3 Luster

Metallic

NA

1.4 Hardness

1.4.1 Mohs Hardness

8.50NA

0.2 8.5

1.4.2 Brinell Hardness

687.00 MPaNA

0.14 3490

1.4.3 Vickers Hardness

1,060.00 MPaNA

121 3430

1.5 Speed of Sound

5,940.00 m/s16,200.00 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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