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Tantalum
Tantalum

Promethium
Promethium



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Tantalum
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Promethium

Atomic Structure of Tantalum and Promethium

1 Atomic
1.1 Atomic Number
7361
3 117
1.2 Electron Configuration
[Xe] 4f14 5d3 6s2
[Xe] 4f5 6s2
1.3 Crystal Structure
Body Centered Cubic (BCC)
Double Hexagonal Close Packed (DHCP)
1.3.1 Crystal Lattice
1.4 Atom
1.4.1 Number of Protons
7361
3 117
1.4.2 Number of Neutrons
10884
4 184
1.4.3 Number of Electrons
7361
3 117
1.5 Radius of an Atom
1.5.1 Atomic Radius
146.00 pm183.00 pm
112 265
1.5.2 Covalent Radius
170.00 pm199.00 pm
96 260
1.5.3 Van der Waals Radius
200.00 pm236.00 pm
139 348
1.6 Atomic Weight
180.95 amu145.00 amu
6.94 294
1.7 Atomic Volume
10.90 cm3/mol22.39 cm3/mol
1.39 71.07
1.8 Adjacent Atomic Numbers
1.8.1 Previous Element
1.8.2 Next Element
1.9 Valence Electron Potential
110.00 (-eV)44.10 (-eV)
8 392.42
1.10 Lattice Constant
330.13 pmNA
228.58 891.25
1.11 Lattice Angles
π/2, π/2, π/2
Unknown
1.12 Lattice C/A Ratio
NANA
1.567 1.886