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Atomic Structure of Erbium and Tantalum


Atomic Structure of Tantalum and Erbium


Atomic Properties

Atomic Number
68   
99+
73   
99+

Electron Configuration
[Xe] 4f12 6s2   
[Xe] 4f14 5d3 6s2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   

Crystal Lattice
HCP-Crystal-Structure-of-Erbium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
68   
99+
73   
99+

Number of Neutrons
99   
33
108   
28

Number of Electrons
68   
99+
73   
99+

Radius of an Atom
  
  

Atomic Radius
176.00 pm   
18
146.00 pm   
35

Covalent Radius
189.00 pm   
19
170.00 pm   
25

Van der Waals Radius
Not Available   
200.00 pm   
28

Atomic Weight
167.26 amu   
99+
180.95 amu   
38

Atomic Volume
18.40 cm3/mol   
25
10.90 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

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Holmium
  
Hafnium
  

Next Element
Thulium
  
Tungsten
  

Valence Electron Potential
49.00 (-eV)   
29
110.00 (-eV)   
7

Lattice Constant
355.88 pm   
39
330.13 pm   
99+

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   

Lattice C/A Ratio
1.57   
17
Not Available   

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