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Multiple Choice
Which of the following is an ionic compound?
A
CH_4
B
NaCl
C
H_2O
D
CO_2
Verified step by step guidance
1
Step 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 the sharing of electrons between nonmetals.
Step 2: Identify the elements in each compound and classify them as metals or nonmetals. For example, NaCl consists of sodium (Na), a metal, and chlorine (Cl), a nonmetal.
Step 3: Analyze each compound: CH_4 (carbon and hydrogen) involves only nonmetals, so it is covalent; H_2O (hydrogen and oxygen) also involves only nonmetals, so it is covalent; CO_2 (carbon and oxygen) involves only nonmetals, so it is covalent.
Step 4: Recognize that NaCl is composed of a metal (Na) and a nonmetal (Cl), which means it forms ions (Na^+ and Cl^-) and is held together by ionic bonds.
Step 5: Conclude that among the given options, NaCl is the ionic compound because it consists of a metal and a nonmetal forming ions, while the others are molecular covalent compounds.