Question

an atom that has lost or gained electrons is known as an ion. which compound below is made up of ions? a ch₄ b co c kbr d so₃

Explanation:

To determine which compound is made of ions, we analyze each option:

• \( \text{CH}_4 \) (A) is a covalent compound (non - metal + non - metal), formed by sharing electrons.
• \( \text{CO} \) (B) is also a covalent compound (non - metal + non - metal), with covalent bonding.
• \( \text{KBr} \) (C): Potassium (\( \text{K} \)) is a metal and Bromine (\( \text{Br} \)) is a non - metal. Ionic compounds are formed between metals and non - metals (or polyatomic ions), where electrons are transferred, forming ions (\( \text{K}^+ \) and \( \text{Br}^- \)) that are held together by ionic bonds.
• \( \text{SO}_3 \) (D) is a covalent compound (non - metal + non - metal), with covalent bonding.

Answer:

C. \( \text{KBr} \)