Home
Compare Metals


Atomic Structure of Promethium and Samarium


Atomic Structure of Samarium and Promethium


Atomic Properties

Atomic Number
61   
99+
62   
99+

Electron Configuration
[Xe] 4f5 6s2   
[Xe] 4f6 6s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Rhombohedral (RHO)   

Crystal Lattice
DHCP-Crystal-Structure-of-Promethium.jpg#100   
RHO-Crystal-Structure-of-Samarium.jpg#100   

Atom
  
  

Number of Protons
61   
99+
62   
99+

Number of Neutrons
84   
40
88   
39

Number of Electrons
61   
99+
62   
99+

Radius of an Atom
  
  

Atomic Radius
183.00 pm   
10
180.00 pm   
14

Covalent Radius
199.00 pm   
12
198.00 pm   
13

Van der Waals Radius
236.00 pm   
16
229.00 pm   
20

Atomic Weight
145.00 amu   
99+
150.36 amu   
99+

Atomic Volume
22.39 cm3/mol   
12
19.95 cm3/mol   
19

Adjacent Atomic Numbers
  
  

Previous Element
Neodymium
  
Promethium
  

Next Element
Samarium
  
Europium
  

Valence Electron Potential
44.10 (-eV)   
39
44.80 (-eV)   
37

Lattice Constant
Not Available   
362.10 pm   
33

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

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical >>
<< Chemical

Compare Lanthanide Series

Lanthanide Metals

Lanthanide Metals

» More Lanthanide Metals

Compare Lanthanide Series

» More Compare Lanthanide Series