Lead

Thallium

Atomic Structure of Lead and Thallium

Lead

Thallium

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Atomic

Atomic Number

8281

3 117

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Electron Configuration

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹

Crystal Structure

Face Centered Cubic (FCC)

Hexagonal Close Packed (HCP)

Crystal Lattice

Atom

Number of Protons

8281

3 117

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Number of Neutrons

125123

4 285

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Number of Electrons

8281

3 117

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Radius of an Atom

Atomic Radius

175.00 pm170.00 pm

0 348

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Covalent Radius

146.00 pm145.00 pm

0 260

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Van der Waals Radius

202.00 pm196.00 pm

0 348

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Atomic Weight

207.20 amu204.38 amu

6.94 294

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Atomic Volume

18.17 cm3/mol17.20 cm3/mol

1.39 71.07

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Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

24.20 (-eV)9.60 (-eV)

0 392.42

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Lattice Constant

495.08 pm345.66 pm

0 891.25

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Lattice Angles

π/2, π/2, π/2

π/2, π/2, 2 π/3

Lattice C/A Ratio

1.511.60

0.423 1.9

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