Explanation: Lewis structure is defined as the structure in which the element is shown with its valence electron represented as dots.
Valence electrons are the electrons present in the last shell.
- For Ne: The atomic number is 10. Valence electronic configuration is [tex][He]2s^22p^6[/tex]
Number of valence electrons = 8
- For Sb: The atomic number if 51. Electronic configuration is [tex][Kr]4d^{10}5s^25p^3[/tex]
Number of valence electron = 5
- For Rn: The atomic number is 86. Electronic configuration is [tex][Xe]4f^{14}5d^{10}6s^26p^6[/tex]
Number of valence electrons = 8
- For a neutral atom with 9 electrons : The atomic number for this element is 9 and the element is Fluorine (F). Electronic configuration is [tex][He]2s^22p^5[/tex]
Number of valence electrons = 7
The lewis structures of all the elements are shown in the image attached.
