QQuestionChemistry
QuestionChemistry
What is the name of the binary ionic compound of calcium and sulfur?
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Answer
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Step 1:: Recall the rules for naming binary ionic compounds.
In a binary ionic compound, the name of the metal always comes first, followed by the name of the nonmetal. The ending of the nonmetal's name is changed to -ide. Since calcium is a metal and sulfur is a nonmetal, this will be a binary ionic compound.
Step 2:: Identify the charges on the ions.
Calcium, being an alkaline earth metal, forms an ion with a + 2 charge. Sulfur, as a chalcogen, forms an ion with a - 2 charge.
Step 3:: Write the formula for the compound.
To write the formula for an ionic compound, you write the symbol for the cation (positive ion) followed by the symbol for the anion (negative ion), with subscripts to indicate their ratio. In this case, the formula will be Ca^2S.
Step 4:: Name the compound.
Since calcium is a metal, we simply use the name of the metal, "calcium". For sulfur, we use the base part of the name, "sulfur", and add the -ide ending for the anion. So the name of the compound is "calcium sulfide".
Final Answer
The name of the binary ionic compound of calcium and sulfur is calcium sulfide.
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