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Question
Write the distribution of electrons in an atom of element whose atomic number is 18. What is special about the outermost electron shell (or valence shell) of the atom of this element?
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Solution
Atomic number is 18
Electron configuration or the distribution of electrons in this atom is :
(2, 8, 8), i.e.,
K = 2; L = 8; M = 8.
The special thing about the outermost shell of this atom is that it is completely filled with electrons. The element will be inert in nature.
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