Use the list to answer the question.

Question

• potassium, Group lA
• calcium, Group lIA
• iodine, Group VIIA
• neon, Group VIllA
Which two elements in the list would bond together based on their ionic charges?
(1 point)
• calcium and potassium
• potassium and neon
• calcium and neon
• potassium and iodine

Answer 1

To determine which two elements would bond together based on their ionic charges, we can look at the groups they belong to:

• Potassium (K) is in Group IA, and it has a charge of +1 when it forms an ion (K⁺).
• Calcium (Ca) is in Group IIA, and it has a charge of +2 when it forms an ion (Ca²⁺).
• Iodine (I) is in Group VIIA, and it has a charge of -1 when it forms an ion (I⁻).
• Neon (Ne) is in Group VIIIA and is a noble gas, it does not typically form ions.

The only pair that would bond due to opposite charges are potassium (K⁺) and iodine (I⁻).

Therefore, the correct answer is:

• potassium and iodine.