Multiple Choice
What is the correct name for the compound NiSO4?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following compounds is correctly classified as ionic?
A
Cl2O
B
KCl
C
CrCl3
Verified step by step guidance1
Step 1: Understand the difference between ionic and covalent compounds. Ionic compounds typically form between metals and nonmetals, where electrons are transferred, resulting in positive and negative ions. Covalent compounds form between nonmetals, where electrons are shared.
Step 2: Identify the elements in each compound. For Cl2O, both chlorine (Cl) and oxygen (O) are nonmetals, so this compound is covalent.
Step 3: For KCl, potassium (K) is a metal and chlorine (Cl) is a nonmetal. This combination usually forms an ionic bond due to electron transfer from metal to nonmetal.
Step 4: For CrCl3, chromium (Cr) is a metal (a transition metal) and chlorine (Cl) is a nonmetal. This compound is also ionic because it consists of metal cations and nonmetal anions.
Step 5: Conclude that KCl and CrCl3 are correctly classified as ionic compounds, while Cl2O is covalent.
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