Use the list to answer the question.

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)
Responses

calcium and potassium
calcium and potassium

potassium and iodine
potassium and iodine

potassium and neon
potassium and neon

calcium and neon

Answer 1

To determine which two elements would bond together based on their ionic charges, we need to look at the groups of the elements provided:

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

The only pair that would bond based on their ionic charges is potassium and iodine:

• Potassium Ion: K⁺
• Iodine Ion: I⁻

When potassium (K⁺) and iodine (I⁻) bond together, they can form potassium iodide (KI).

Therefore, the correct answer is:

potassium and iodine