Multiple Choice
Which statement best describes the compound magnesium oxide?
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3. Chemical Reactions
Naming Ionic Compounds
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What is the correct name for the ionic compound LiI?
A
Lithium iodine
B
Lithium(II) iodide
C
Lithium iodide
D
Lithium triiodide
Verified step by step guidance1
Identify the ions involved in the compound LiI. Lithium (Li) is a metal that forms a cation with a +1 charge, written as Li\^{+}. Iodine (I) is a nonmetal that forms an anion with a -1 charge, written as I\^{-}.
Determine the charges of the ions to ensure the compound is electrically neutral. Since Li\^{+} has a +1 charge and I\^{-} has a -1 charge, they combine in a 1:1 ratio to balance the charges.
Name the cation first, which is the metal ion. For lithium, the name remains 'lithium' because it is an alkali metal and does not require a Roman numeral to indicate its charge.
Name the anion second by taking the root of the element name and adding the suffix '-ide'. For iodine, the anion name becomes 'iodide'.
Combine the names of the cation and anion to form the compound name: 'lithium iodide'. This is the correct and systematic name for LiI.
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