Bismuth

Thallium

Atomic Structure of Bismuth and Thallium

Bismuth

Thallium

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Atomic

Atomic Number

8381

3 117

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Electron Configuration

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹

Crystal Structure

Rhombohedral (RHO)

Hexagonal Close Packed (HCP)

Crystal Lattice

Atom

Number of Protons

8381

3 117

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Number of Neutrons

126123

4 285

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Number of Electrons

8381

3 117

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Radius of an Atom

Atomic Radius

156.00 pm170.00 pm

0 348

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Covalent Radius

148.00 pm145.00 pm

0 260

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Van der Waals Radius

207.00 pm196.00 pm

0 348

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Atomic Weight

208.98 amu204.38 amu

6.94 294

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Atomic Volume

21.30 cm3/mol17.20 cm3/mol

1.39 71.07

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Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

41.90 (-eV)9.60 (-eV)

0 392.42

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Lattice Constant

667.40 pm345.66 pm

0 891.25

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Lattice Angles

π/2, π/2, 2 π/3

Lattice C/A Ratio

1.861.60

0.423 1.9

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