Atomic Structure of Roentgenium and Erbium
Atomic Properties
Atomic Number
111
7
68
99+
Electron Configuration
[Rn] 5f14 6d9 7s2
[Xe] 4f12 6s2
Crystal Structure
Body Centered Cubic (BCC)
Hexagonal Close Packed (HCP)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
HCP-Crystal-Structure-of-Erbium.jpg#100
Atom
Number of Protons
111
7
68
99+
Number of Neutrons
161
3
99
33
Number of Electrons
111
7
68
99+
Radius of an Atom
Atomic Radius
Not Available
176.00 pm
18
Covalent Radius
Not Available
189.00 pm
19
Atomic Weight
281.00 amu
6
167.26 amu
99+
Atomic Volume
Not Available
18.40 cm3/mol
25
Adjacent Atomic Numbers
Valence Electron Potential
Not Available
49.00 (-eV)
29
Lattice Constant
Not Available
355.88 pm
39
Lattice Angles
NA
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
1.57
17
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