Extended Periodic Table
      

 Atomic No. Order:
  [Picture]

 Alphabetic Order:
  [Picture]

  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

Symbol Sr
Atomic Number 38
Relative Atomic Mass
12C = 12.0000 		87.62  (±1)  [Since 1969]
Atomic Radius  pm 215
First Ionisation Energy
kJ mol-1 		549.5
Ionisation Energy (eV) 5.6949
Electronegativity 0.95
Density
kg m-3 		2540 [293 K]
2375 [l., m.p.]
Molar Volume  cm3 34.50
Thermal Conductivity
W m-1 K-1 		35.3 [300 K]
Melting Point K 1042
Boiling Point  K 1657
Number of Isotopes 23
Isotope Atomic mass/u Mole fraction 84Sr 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
2 6

10

14

18
     
6
               
7
               
8
               
  
Term Symbol 1S 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 From The name derives from Strontian, a town in Scotland. The mineral strontianite is found in mines in Strontian. 
 

[Picture]

APSIDIUM  ©   Created:      2002-06-04  

This page as PDF-file
038.pdf

Top Home

 Page update:    2004-06-19