Question

15 )Which of the following can readily form a cation?
O Oxygen
O Chlorine
O Fluorine
O Lithium​

Answer 1

Answer:

Fluorine

Explanation:

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Answer 2

Among the following, the one that can readily form a cation is Lithium.

Explanation:

• Ions are charged species formed by the loss or gain of electrons by an atom.
• When an atom loses an electron, it forms a positive ion called cation while on gaining an electron, an atom forms a negative ion called an anion.
• Metals have loosely bound electrons in their outermost shell. Therefore, they have a tendency to lose electrons to form cations.
• On the other hand, non-metals need an electron to complete their octet. So, they have a tendency to gain electrons to form anions.
• Oxygen, chlorine and fluorine are non-metals. They need one electron to complete their octet. Therefore, they readily form an anion.
• Lithium is a metal. It has a loosely bound electron in its outermost shell. Therefore, it can readily form a cation.

        $\[Li \to L{i^ + } + {e^ - }\]$