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Thulium
Thulium

Chromium
Chromium



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Thulium
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Chromium

Atomic Structure of Thulium and Chromium

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Atomic

Atomic Number

6924
3 117
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Electron Configuration

[Xe] 4f13 6s2
[Ar] 3d5 4s1

Crystal Structure

Hexagonal Close Packed (HCP)
Body Centered Cubic (BCC)

Crystal Lattice

Atom

Number of Protons

6924
3 117
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Number of Neutrons

10028
4 285
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Number of Electrons

6924
3 117
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Radius of an Atom

Atomic Radius

176.00 pm128.00 pm
0 348
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Covalent Radius

160.00 pm139.00 pm
0 260
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Van der Waals Radius

227.00 pm200.00 pm
0 348
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Atomic Weight

168.93 amu52.00 amu
6.94 294
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Atomic Volume

18.10 cm3/mol7.23 cm3/mol
1.39 71.07
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Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

49.70 (-eV)170.00 (-eV)
0 392.42
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Lattice Constant

353.75 pm291.00 pm
0 891.25
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Lattice Angles

π/2, π/2, 2 π/3
π/2, π/2, π/2

Lattice C/A Ratio

1.571.86
0.423 1.9
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