1 Atomic
1.1 Atomic Number
1.2 Electron Configuration
[Xe] 4f6 6s2
[Rn] 5f7 7s2
1.3 Crystal Structure
Rhombohedral (RHO)
Double Hexagonal Close Packed (DHCP)
1.3.1 Crystal Lattice
1.4 Atom
1.4.1 Number of Protons
1.4.2 Number of Neutrons
1.4.3 Number of Electrons
1.5 Radius of an Atom
1.5.1 Atomic Radius
180.00 pm173.00 pm
112
265
1.5.2 Covalent Radius
198.00 pm180.00 pm
96
260
1.5.3 Van der Waals Radius
229.00 pm244.00 pm
139
348
1.6 Atomic Weight
150.36 amu243.00 amu
6.94
294
1.7 Atomic Volume
19.95 cm3/mol17.86 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
44.80 (-eV)44.00 (-eV)
8
392.42
1.10 Lattice Constant
362.10 pm346.81 pm
228.58
891.25
1.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
1.12 Lattice C/A Ratio