Extended Periodic Table
      

 Atomic No. Order:
  [Picture]

 Alphabetic Order:
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  Periodic Table

  Ground State Electron Configuration

  2, 8, 18,  

  8, 2  

 

 

Be
4		Mg
12		Ca
20		Sr
38		Ba
56		  Ra
88		Ubn
120		Usn
170		Bbn
220

Strontium

SymbolSr
Atomic Number38
Relative Atomic Mass
12C = 12.0000		87.62  (±1)  [Since 1969]
Atomic Radius  pm215
First Ionisation Energy
kJ mol-1		549.5
Ionisation Energy (eV)5.6949
Electronegativity0.95
Density
kg m-3		2540 [293 K]
2375 [l., m.p.]
Molar Volume  cm334.50
Thermal Conductivity
W m-1 K-1		35.3 [300 K]
Melting Point K1042
Boiling Point  K1657
Number of Isotopes23
Isotope Atomic mass/u Mole fraction84Sr 83.913 426(4) 0.0056(1)
86Sr 85.909 2647(25) 0.0986(1)
87Sr 86.908 8816(25) 0.0700(1)
88Sr 87.905 6167(25) 0.8258(1)
Inner + outer Shells
  3  +  2   =5
Inner + outer Orbitals
  28  +  10   =38
Filling Orbital
  5s 2   
Ground State Electron
Configuration
[Kr]  5s 2      
Ground State Electron
Configuration with
free Orbitals (n=16)

 

  0, 0, 0, 10, 6  

[Picture]
Ground State Electron
Configuration with
compressed Orbitals (n=56)

 

  0, 0, 0, 14, 42  

[Picture]
 
Singularity
110= 28+10+16+56
 
 
s
p
d
 f
g
h
i
j
1
2
       
2
2
6
      
3
2
6
10
     
4
2
6
10

14

    
5
26

10

14

18
   
6
        
7
        
8
        
  
Term Symbol1S 0
Discovery

The element was discovered in 1792 by the Scottish chemist and physician Thomas Charles Hope, who observed the brilliant red flame color of strontium. It was first isolated by the English chemist Humphry Davy (London, England) in 1808.
 

Name Derived FromThe name derives from Strontian, a town in Scotland. The mineral strontianite is found in mines in Strontian. 
 

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APSIDIUM  ©  Created:    2002-06-04 

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