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Calcium
Calcium




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Atomic Structure of Calcium

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Atomic

Atomic Number

20
Rank: 86 (Overall)
3 117
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Electron Configuration

[Ar] 4s2

Crystal Structure

Face Centered Cubic (FCC)

Crystal Lattice

Atom

Number of Protons

20
Rank: 85 (Overall)
3 117
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Number of Neutrons

20
Rank: 65 (Overall)
4 285
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Number of Electrons

20
Rank: 85 (Overall)
3 117
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Radius of an Atom

Atomic Radius

197.00 pm
Rank: 8 (Overall)
0 348
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Covalent Radius

176.00 pm
Rank: 24 (Overall)
0 260
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Van der Waals Radius

231.00 pm
Rank: 23 (Overall)
0 348
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Atomic Weight

40.08 amu
Rank: 80 (Overall)
6.94 294
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Atomic Volume

29.90 cm3/mol
Rank: 10 (Overall)
1.39 71.07
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Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

29.00 (-eV)
Rank: 55 (Overall)
0 392.42
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Lattice Constant

558.84 pm
Rank: 10 (Overall)
0 891.25
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Lattice Angles

π/2, π/2, π/2

Lattice C/A Ratio

1.55
Rank: 46 (Overall)
0.423 1.9
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