QQuestionChemistry
QuestionChemistry
"For each ionic compound formula, identify the main group to which X belongs:
(c) X(NO3)2
"
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Answer
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Step 1:: Identify the charge on the nitrate ion (NO₃⁻).
The charge on the nitrate ion is - 1, as it has one nitrogen atom and three oxygen atoms with a combined charge of - 3, making the ion's charge - 1 to balance the overall charge.
Step 2:: Determine the charge on X to balance the overall charge of the compound.
Since the overall charge of the compound is zero, the charge on X must balance the - 2 charge from the two nitrate ions. Therefore, X must have a + 2 charge.
Step 3:: Identify the main group to which X belongs based on its charge.
A charge of + 2 on an ion indicates that X has lost two electrons. This occurs for elements in the second main group (IIA) of the periodic table, which includes alkaline earth metals.
Final Answer
X in X(NO₃)₂ belongs to the second main group (IIA) of the periodic table, which includes alkaline earth metals.
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