Question

What is the most stable monatomic ion formed from fluorine

Answer 1

Answer: The stable mono atomic ion of fluorine is $F^-$

Explanation:

Mono atomic ion is defined as the ion which is formed by 1 element only.

An ion is formed when an atom looses or gains electron.

• When an atom looses electrons, it will form a positive ion known as cation.
• When an atom gains electrons, it will form a negative ion known as anion.

Fluorine is the 9th element in the periodic table. The electronic configuration of this element is $1s^22s^22p^5$

This element will gain 1 electron to form $F^-$ ion.

Hence, the stable mono atomic ion of fluorine is $F^-$

Answer 2

A fluorine element has 7 valence electrons.

A stable fluorine ion should have 8 valence electrons.

So fluorine gains an extra electron.

Thus, the most stable monatomic ion is $F^{-}$