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What is the correct arrangements of electrons in various shells, sub-shells and orbitals in an atom?

What is the correct arrangements of electrons in various shells, sub-shells and orbitals in an atom? Correct Answer 2, 8, 8,18,18, 32

The correct answer is 2 i.e. 2, 8, 8, 18, 18, 32.

Explanation:

  • Electronic configuration:
    • It is an arrangement of electrons in various shells, sub-shells and orbitals in an atom.
    • It is written as 2, 8, 8, 18, 18, 32.
    • It is written as nlx ( where n indicates the principal quantum number), l indicates the azimuthal quantum number or sub-shell, and x is the number of electrons. 
    • Number of electrons in n shell = 2n2 e.g. in the second shell the number of electrons = 2*22 = 8 exceptions of normal people. 
  • Electronic configuration of some elements are tabulated below:
    Element Configuration   
      2, 8, 8.... type nlx
    Sodium(Na-11) 2, 8, 1 1s2, 2s2, 2p6, 3s1.
    Iron (Fe-26) 2, 8, 14, 2 1s2, 2s2, 2p6, 3s2, 3p6, 3d6, 4s2.

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