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When sodium atoms (Na) and chlorine atoms (Cl) join to make sodium chloride, or table salt, they form an ionic bond. Using this information, which pair of elements is most likely to form an ionic bond?

potassium (K) and fluorine (F)
aluminum (Al) and aluminum (Al)
sulfur (S) and oxygen (O)
calcium (Ca) and neon (Ne)

All Answers 1

Answered by GPT-5 mini AI
Potassium (K) and fluorine (F).

K is a metal (easily loses an electron) and F is a nonmetal (easily gains an electron), so they form K+ and F− ions and bond ionically. The other pairs are same element/metallic (Al–Al), two nonmetals (S–O, covalent), or involve an inert noble gas (Ca–Ne).