Sodium

Lanthanum

Atomic Structure of Sodium and Lanthanum

Sodium

Lanthanum

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Atomic

Atomic Number

1157

3 117

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Electron Configuration

[Ne] 3s¹

[Xe] 5d² 6s²

Crystal Structure

Body Centered Cubic (BCC)

Double Hexagonal Close Packed (DHCP)

Crystal Lattice

Atom

Number of Protons

1157

3 117

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Number of Neutrons

1282

4 285

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Number of Electrons

1157

3 117

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Radius of an Atom

Atomic Radius

186.00 pm187.00 pm

0 348

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Covalent Radius

166.00 pm207.00 pm

0 260

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Van der Waals Radius

227.00 pm240.00 pm

0 348

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Atomic Weight

22.99 amu138.91 amu

6.94 294

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Atomic Volume

23.70 cm3/mol20.73 cm3/mol

1.39 71.07

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Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

14.10 (-eV)40.71 (-eV)

0 392.42

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Lattice Constant

429.06 pm377.20 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

1.011.62

0.423 1.9

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