Thulium

Cerium

Atomic Structure of Thulium and Cerium

Thulium

Cerium

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Atomic

Atomic Number

6958

3 117

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Electron Configuration

[Xe] 4f¹³ 6s²

[Xe] 4f¹ 5d¹ 6s²

Crystal Structure

Hexagonal Close Packed (HCP)

Double Hexagonal Close Packed (DHCP)

Crystal Lattice

Atom

Number of Protons

6958

3 117

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Number of Neutrons

10082

4 285

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Number of Electrons

6958

3 117

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Radius of an Atom

Atomic Radius

176.00 pm181.80 pm

0 348

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Covalent Radius

160.00 pm204.00 pm

0 260

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Van der Waals Radius

227.00 pm235.00 pm

0 348

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Atomic Weight

168.93 amu140.12 amu

6.94 294

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Atomic Volume

18.10 cm3/mol20.67 cm3/mol

1.39 71.07

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Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

49.70 (-eV)41.78 (-eV)

0 392.42

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Lattice Constant

353.75 pm362.00 pm

0 891.25

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Lattice Angles

π/2, π/2, 2 π/3

Lattice C/A Ratio

1.571.59

0.423 1.9

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