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Atomic Structure of Potassium and Protactinium

Potassium
Protactinium
Atomic Structure of Protactinium and Potassium


Atomic
Atomic Number
19  
99+
91  
27
Electron Configuration
[Ar] 4s1  
[Rn] 5f2 6d1 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Tetragonal (TETR)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
TETR-Crystal-Structure-of-Protactinium.jpg#100  
Atom
  
  
Number of Protons
19  
99+
91  
27
Number of Neutrons
20  
99+
122  
22
Number of Electrons
19  
99+
91  
27
Radius of an Atom
  
  
Atomic Radius
227.00 pm  
4
163.00 pm  
27
Covalent Radius
203.00 pm  
9
200.00 pm  
11
Van der Waals Radius
275.00 pm  
7
243.00 pm  
15
Atomic Weight
39.10 amu  
99+
231.04 amu  
24
Atomic Volume
45.46 cm3/mol  
4
15.00 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
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Aluminium
  
Thorium
  
Next Element
Calcium
  
Uranium
  
Valence Electron Potential
10.40 (-eV)  
99+
92.00 (-eV)  
11
Lattice Constant
532.80 pm  
13
392.50 pm  
26
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.69  
10
1.58  
36
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