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Atomic and Molecular Calculations of Physical and Chemical Properties

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Calculation of total energies of some atoms using FDA code


We present the total energies expressed in a.u (hartree) units for some atoms in neutral and excited states. To compare results, we give other values in the link at the end.


------ Hydrogen atom ----------

Property from H1504.out

                   Orbital Summary
 nl    occ        E           KE       <1/r>     <r>
 1s   1.00      -0.5002      0.5003    1.0005   1.4994

     Energy Summary
 kinetic energy      =     0.5003
 potential energy    =    -1.0005
 one-electron energy =    -0.5001
 two-electron energy =     0.0000

 total energy =    -0.5002
 virial ratio =    -1.9996

--------------------------------------

---- Helium atom-----------

Property from He1505.out

                   Orbital Summary
 nl    occ        E           KE       <1/r>     <r>
 1s   2.00      -0.8998      1.5175    1.7352   0.9133

     Energy Summary
 kinetic energy      =     3.0349
 potential energy    =    -5.8876
 one-electron energy =    -3.9058
 two-electron energy =     1.0531

 total energy =    -2.8527
 virial ratio =    -1.9399

-----------------------------

------------- Helium ion He+ -----------
Property from He1510.out

                   Orbital Summary
 nl    occ        E           KE       <1/r>     <r>
 1s   1.00      -2.0007      2.0010    2.0007   0.7497

     Energy Summary
 kinetic energy      =     2.0010
 potential energy    =    -4.0016
 one-electron energy =    -2.0005
 two-electron energy =    -0.0001

 total energy =    -2.0006
 virial ratio =    -1.9998

--------------------------------------------

------ Lithium atom-------------
Property from Li1506.out

                   Orbital Summary
 nl    occ        E           KE       <1/r>     <r>
 1s   2.00      -2.2989      3.9238    2.7994   0.5490
 2s   1.00      -0.2044      0.2483    0.3695   3.7083

     Energy Summary
 kinetic energy      =     8.0959
 potential energy    =   -15.4017
 one-electron energy =    -9.8094
 two-electron energy =     2.5036

 total energy =    -7.3058
 virial ratio =    -1.9024

--------------------------

--------- Lithium ion Li+ --------------

Property from Li1512.out

                   Orbital Summary
 nl    occ        E           KE       <1/r>     <r>
 1s   2.00      -2.7669      3.7450    2.7329   0.5669

     Energy Summary
 kinetic energy      =     7.4900
 potential energy    =   -14.7107
 one-electron energy =    -8.9076
 two-electron energy =     1.6868

 total energy =    -7.2207
 virial ratio =    -1.9640

--------------------------------------------

---------- Berylium atom ------------
Property from Be1507.out

                   Orbital Summary
 nl    occ        E           KE       <1/r>     <r>
 1s   2.00      -4.4723      7.1742    3.7866   0.4037
 2s   2.00      -0.3162      0.6097    0.5653   2.5256

     Energy Summary
 kinetic energy      =    15.5680
 potential energy    =   -29.9799
 one-electron energy =   -19.2467
 two-electron energy =     4.8348

 total energy =   -14.4119
 virial ratio =    -1.9257

------------------------------------------

Link for comparaison

https://www.nist.gov/pml/data/atomic-total-energies-and-eigenvalues-html

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