Atomic Structure of Technetium and Thorium
Atomic Properties
Atomic Number
43
99+
90
28
Electron Configuration
[Kr] 4d5 5s2
[Rn] 6d2 7s2
Crystal Structure
Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100
FCC-Crystal-Structure-of-Thorium.jpg#100
Atom
Number of Protons
43
99+
90
28
Number of Neutrons
55
99+
142
15
Number of Electrons
43
99+
90
28
Radius of an Atom
Atomic Radius
136.00 pm
99+
179.80 pm
15
Covalent Radius
147.00 pm
37
206.00 pm
7
Van der Waals Radius
200.00 pm
28
237.00 pm
15
Atomic Weight
98.00 amu
99+
232.04 amu
23
Atomic Volume
8.50 cm3/mol
99+
19.90 cm3/mol
20
Adjacent Atomic Numbers
Valence Electron Potential
180.00 (-eV)
3
59.30 (-eV)
23
Lattice Constant
273.50 pm
99+
508.42 pm
14
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
1.60
5
Not Available
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