Multiple Choice
Which of the following compounds requires a Roman numeral in its name?
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3. Chemical Reactions
Naming Ionic Compounds
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What is the correct name for a compound consisting of two bromine atoms and one calcium atom?
A
Dibromine calcium
B
Calcium dibromide
C
Bromine calcium
D
Calcium bromide
Verified step by step guidance1
Identify the elements in the compound: calcium (Ca) and bromine (Br).
Determine the type of compound: calcium is a metal and bromine is a nonmetal, so this is an ionic compound.
Recall the naming convention for ionic compounds: the metal (cation) is named first, followed by the nonmetal (anion) with its ending changed to '-ide'.
Since calcium forms a Ca²⁺ ion and bromine forms a Br⁻ ion, the formula is CaBr₂, indicating two bromide ions per calcium ion.
Therefore, the correct name is 'calcium bromide', reflecting the metal first and the nonmetal with the '-ide' suffix.
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