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Thallium
Thallium

Samarium
Samarium



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Thallium
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Samarium

Atomic Structure of Thallium and Samarium

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Atomic

Atomic Number

8162
3 117
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Electron Configuration

[Xe] 4f14 5d10 6s2 6p1
[Xe] 4f6 6s2

Crystal Structure

Hexagonal Close Packed (HCP)
Rhombohedral (RHO)

Crystal Lattice

Atom

Number of Protons

8162
3 117
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Number of Neutrons

12388
4 285
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Number of Electrons

8162
3 117
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Radius of an Atom

Atomic Radius

170.00 pm180.00 pm
0 348
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Covalent Radius

145.00 pm198.00 pm
0 260
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Van der Waals Radius

196.00 pm229.00 pm
0 348
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Atomic Weight

204.38 amu150.36 amu
6.94 294
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Atomic Volume

17.20 cm3/mol19.95 cm3/mol
1.39 71.07
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Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

9.60 (-eV)44.80 (-eV)
0 392.42
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Lattice Constant

345.66 pm362.10 pm
0 891.25
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Lattice Angles

π/2, π/2, 2 π/3
π/2, π/2, 2 π/3

Lattice C/A Ratio

1.601.62
0.423 1.9
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