Question

use the list to answer the question.

• potassium, group ia
• calcium, group iia
• iodine, group viia
• neon, group viiia

which two elements in the list would bond together based on their ionic charges? (1 point)
calcium and neon
potassium and neon
calcium and potassium
potassium and iodine

Explanation:

Step1: Determine ionic charges

Elements in Group IA (like potassium) form +1 ions, Group IIA (calcium) form +2 ions, Group VIIA (iodine) form - 1 ions, and Group VIIIA (neon) are noble - gases with stable electron configurations and do not form ions easily.

Step2: Analyze ion - pair for bonding

Oppositely charged ions bond. Potassium (+1) and iodine (-1) can form an ionic bond. Calcium and neon won't bond as neon is inert. Potassium and neon won't bond for the same reason. Calcium and potassium are both metals and won't form an ionic bond with each other.

Answer:

potassium and iodine