×
Lanthanum
☒
Protactinium
☒
Top
ADD
⊕
Compare
Compare Metals
Transition Metals
Actinide Series
Lanthanide Series
Post Transition Metals
Alkaline Earth Metals
Alkali Metals
⌕
▼
X
Lanthanum
X
Protactinium
Atomic Structure of Lanthanum and Protactinium
Lanthanum
Protactinium
Add ⊕
Summary
Periodic Table
Facts
Uses
Physical
Chemical
Atomic
Mechanical
Magnetic
Thermal
All
Atomic
Atomic Number
57
91
3
117
👆🏻
Electron Configuration
[Xe] 5d
2
6s
2
[Rn] 5f
2
6d
1
7s
2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Tetragonal (TETR)
Crystal Lattice
Atom
Number of Protons
57
91
3
117
👆🏻
Number of Neutrons
82
122
4
285
👆🏻
Number of Electrons
57
91
3
117
👆🏻
Radius of an Atom
Atomic Radius
187.00 pm
163.00 pm
0
348
👆🏻
Covalent Radius
207.00 pm
200.00 pm
0
260
👆🏻
Van der Waals Radius
240.00 pm
243.00 pm
0
348
👆🏻
Atomic Weight
138.91 amu
231.04 amu
6.94
294
👆🏻
Atomic Volume
20.73 cm3/mol
15.00 cm3/mol
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
40.71 (-eV)
92.00 (-eV)
0
392.42
👆🏻
Lattice Constant
377.20 pm
392.50 pm
0
891.25
👆🏻
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
1.62
1.58
0.423
1.9
👆🏻
Compare Lanthanide Series
» More
Lanthanum vs Terbium
Lanthanum vs Dysprosium
Lanthanum vs Holmium
» More Compare Lanthanide Series
Lanthanide Series
» More
Europium
Promethium
Thulium
Ytterbium
Terbium
Dysprosium
» More Lanthanide Series
Lanthanide Series
» More
Holmium
Periodic ...
|
Facts
|
Uses
|
Physical
Lutetium
Periodic ...
|
Facts
|
Uses
|
Physical
Praseodymium
Periodic ...
|
Facts
|
Uses
|
Physical
Compare Lanthanide Series
» More
Protactinium vs Promethium
Periodic ...
|
Facts
|
Uses
|
Physical
Protactinium vs Thulium
Periodic ...
|
Facts
|
Uses
|
Physical
Protactinium vs Ytterbium
Periodic ...
|
Facts
|
Uses
|
Physical