Answer: The ion formed by lithium element is [tex]Li^+[/tex]
Explanation:
Ions are formed when an atom looses or gains electrons.
If an atom gains electrons, it leads to the formation of negative ions known as anions. For Example: Fluorine gains 1 electron to form [tex]F^-[/tex] ions.
If an atom looses electrons, it leads to the formation of positive ions known as cations. For Example: Sodium looses 1 electron to form [tex]Na^+[/tex] ions.
Lithium is the 3rd element of the periodic table having 3 electrons.
The electronic configuration of lithium element = [tex]1s^22s^1[/tex]
This element will loose 1 electron to attain stable electronic configuration and will lead to the formation of [tex]Li^+[/tex] ion.
Hence, the ion formed by lithium element is [tex]Li^+[/tex]