Question

Which pair of elements can form an ionic compound?

Answer 1

Answer:

Barium and iodine are a metal and nonmetal, respectively, and can form an ionic compound. Carbon and hydrogen are both nonmetals, as are chlorine and xenon, and will form covalent compounds. Sodium and magnesium are both metals, which form cations and therefore cannot form a compound.

Explanation:

Answer 2

alkali and alkaline earth metals combines with chalcogens and halogens to form ionic compound

• they are composed of ions
• they are held together by strong electrostatic force of attraction
• Kossel explained the formation of ionic bonds in ionic compounds
• these compounds have high melting and boiling point
• they conduct electricity in the molten or aqueous state
• they are compsed of cations and anions.

hence,alkali and alkaline earth metals combines with chalcogens and halogens to form ionic compound.