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Beryllium
Beryllium

Calcium
Calcium



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Beryllium
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Calcium

Atomic Structure of Beryllium and Calcium

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Atomic

Atomic Number

420
3 117
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Electron Configuration

[He] 2s2
[Ar] 4s2

Crystal Structure

Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)

Crystal Lattice

Atom

Number of Protons

420
3 117
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Number of Neutrons

520
4 285
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Number of Electrons

420
3 117
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Radius of an Atom

Atomic Radius

112.00 pm197.00 pm
0 348
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Covalent Radius

96.00 pm176.00 pm
0 260
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Van der Waals Radius

153.00 pm231.00 pm
0 348
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Atomic Weight

9.01 amu40.08 amu
6.94 294
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Atomic Volume

5.00 cm3/mol29.90 cm3/mol
1.39 71.07
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Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

82.00 (-eV)29.00 (-eV)
0 392.42
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Lattice Constant

228.58 pm558.84 pm
0 891.25
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Lattice Angles

π/2, π/2, π/2
π/2, π/2, π/2

Lattice C/A Ratio

1.571.55
0.423 1.9
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