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Multiple Choice
Which of the following compounds is most likely an ionic compound?
A
CO_2
B
H_2O
C
C_6H_{12}O_6
D
NaCl
Verified step by step guidance
1
Understand the difference between ionic and covalent compounds: Ionic compounds are formed by the transfer of electrons between metals and nonmetals, resulting in positive and negative ions held together by electrostatic forces. Covalent compounds involve sharing electrons between nonmetals.
Analyze the given compounds: CO_2 (carbon dioxide), H_2O (water), and C_6H_{12}O_6 (glucose) are all composed of nonmetals only, which typically form covalent bonds rather than ionic bonds.
Recognize that NaCl (sodium chloride) consists of a metal (Na) and a nonmetal (Cl), which is characteristic of ionic compounds due to the transfer of electrons from sodium to chlorine.
Conclude that among the options, NaCl is most likely an ionic compound because it contains a metal and a nonmetal forming ions, whereas the other compounds are molecular and covalent.
Remember that ionic compounds generally have high melting points, conduct electricity when molten or dissolved in water, and form crystalline solids, which are properties consistent with NaCl.