Yttrium

Lanthanum

Atomic Structure of Yttrium and Lanthanum

Yttrium

Lanthanum

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Atomic

Atomic Number

3957

3 117

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Electron Configuration

[Kr] 4d¹ 5s²

[Xe] 5d² 6s²

Crystal Structure

Hexagonal Close Packed (HCP)

Double Hexagonal Close Packed (DHCP)

Crystal Lattice

Atom

Number of Protons

3957

3 117

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Number of Neutrons

5082

4 285

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Number of Electrons

3957

3 117

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Radius of an Atom

Atomic Radius

180.00 pm187.00 pm

0 348

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Covalent Radius

190.00 pm207.00 pm

0 260

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Van der Waals Radius

200.00 pm240.00 pm

0 348

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Atomic Weight

88.91 amu138.91 amu

6.94 294

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Atomic Volume

19.80 cm3/mol20.73 cm3/mol

1.39 71.07

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Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

48.00 (-eV)40.71 (-eV)

0 392.42

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Lattice Constant

364.74 pm377.20 pm

0 891.25

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Lattice Angles

π/2, π/2, 2 π/3

Lattice C/A Ratio

1.571.62

0.423 1.9

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