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 neon
calcium and neon

potassium and neon
potassium and neon

calcium and potassium
calcium and potassium

potassium and iodine

Answer 1

To determine which two elements would bond together based on their ionic charges, we can look at the typical charges of the elements based on their group numbers:

• Potassium (K) is in Group IA, which typically has a charge of +1.
• Calcium (Ca) is in Group IIA, which typically has a charge of +2.
• Iodine (I) is in Group VIIA, which typically has a charge of -1.
• Neon (Ne) is in Group VIIIA, which is a noble gas and does not typically form bonds since it has a full valence shell.

For ionic bonding, we typically need a metal (which gives up electrons and becomes positively charged) and a nonmetal (which accepts electrons and becomes negatively charged).

From the list, the most likely pair for ionic bonding would be:

Potassium (K, +1) and Iodine (I, -1).

Thus, they will bond to form potassium iodide (KI).

So the correct answer is:

potassium and iodine.