Chemistry
Element Y is in Group IIA of the Periodic Table. Y reacts with element Q to form an ionic compound. Which equation shows the process that takes place when Y forms ions?
- Y + 2e- ⟶ Y2+
- Y - 2e- ⟶ Y2-
- Y + 2e- ⟶ Y2-
- Y - 2e- ⟶ Y2+
Periodic Table
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Answer
Y - 2e- ⟶ Y2+
Reason — Group IIA elements are alkaline earth metals with 2 electrons in their outermost shell. To achieve a stable noble gas configuration, they prefer to lose these 2 electrons rather than gain more forming a positive ion. Hence, the equation will be
Y - 2e- ⟶ Y2+
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