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Use the list to answer the 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

1 answer

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.