Questions: Decide which element probably forms a compound with oxygen that has a chemical formula most and least similar to the chemical formula of the compound formed by oxygen and strontium.

Decide which element probably forms a compound with oxygen that has a chemical formula most and least similar to the chemical formula of the compound formed by oxygen and strontium.
Transcript text: Decide which element probably forms a compound with oxygen that has a chemical formula most and least similar to the chemical formula of the compound formed by oxygen and strontium.
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Solution

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Solution Steps

Step 1: Identify the Chemical Formula of Strontium Oxide
  • Strontium (Sr) is an alkaline earth metal in Group 2 of the periodic table.
  • Oxygen (O) typically forms a compound with Group 2 elements in a 1:1 ratio, resulting in the formula \( \text{SrO} \).
Step 2: Compare with Other Elements
  • Barium (Ba): Also a Group 2 element, likely forms \( \text{BaO} \), similar to \( \text{SrO} \).
  • Carbon (C): Typically forms \( \text{CO}_2 \) or \( \text{CO} \), not similar to \( \text{SrO} \).
  • Potassium (K): An alkali metal in Group 1, likely forms \( \text{K}_2\text{O} \), not similar to \( \text{SrO} \).
  • Cestum (hypothetical element): No information provided, assume it does not form a compound similar to \( \text{SrO} \).
Step 3: Determine Most and Least Similar
  • Most Similar: Barium (Ba), as it forms \( \text{BaO} \), which is similar to \( \text{SrO} \).
  • Least Similar: Carbon (C), as it forms \( \text{CO}_2 \) or \( \text{CO} \), which are not similar to \( \text{SrO} \).

Final Answer

Most similar: \( \boxed{\text{Barium}} \)
Least similar: \( \boxed{\text{Carbon}} \)

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