Write the distribution of electrons in an atom of an element whose atomic mass is 18. What is special about the outermost shell of an atom in this element ?

Dear student,

The electronic configuration of the element is 2, 8, 8.
As we can see from the electronic configuration of the given element, the outermost shell of the element is completely field according to the octet rule, which says that the maximum electrons present in the outermost shell is eight except for first shell.
Thus, this element is neutral to any reaction or formation of the compound since it does not require any more electrons to complete its outermost shell.

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