QQuestionChemistry
QuestionChemistry
Which statements are correct when barium and oxygen react to form an ionic compound?
I. Each barium atom loses 2 electrons and forms a cation.
II. Oxygen atoms form oxide anions (O^2−).
III. The ions are present in a one-to-one ratio in the compound.
A. I and II only
B. II and III only
C. I and III only
D. I, II, and III
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Answer
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Step 1Let's solve this step by step:
Step 2: Understand the electron configuration of barium
Ba \rightarrow Ba^{2+} + 2e^{-}
- Barium (Ba) is in Group 2 (alkaline earth metals) - Its electron configuration is [Xe] 6s² - To achieve a stable electron configuration, barium will lose its 2 valence electrons - This forms a Ba²⁺ cation
Final Answer
I, II, and III are all correct statements about the ionic compound formed between barium and oxygen.
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