Question
Download Solution PDFElement X forms a chloride with the formula XCl₂, which is a solid with high melting point. X would most likely be in the same group of periodic table as
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
Periodic Groups and Their Properties
- Elements in the same group of the periodic table have similar chemical properties because they have the same number of valence electrons.
- Group 2 elements, also known as alkaline earth metals (e.g., Be, Mg, Ca, etc.), typically form compounds with the formula XCl₂, where X is the metal, and Cl is the chloride ion.
- These chlorides are ionic compounds that are generally solids with high melting points due to the strong electrostatic forces between the ions.
EXPLANATION:
- The formula of the chloride formed by element X is XCl₂, which suggests that X has a valency of +2.
- In the periodic table:
- Na (sodium) belongs to Group 1 and forms NaCl, not XCl₂.
- Al (aluminum) belongs to Group 13 and forms AlCl₃, not XCl₂.
- Mg (magnesium) belongs to Group 2 and forms MgCl₂, which matches the formula XCl₂.
- K (potassium) belongs to Group 1 and forms KCl, not XCl₂.
Since the formula XCl₂ is characteristic of Group 2 elements, X is most likely in the same group as magnesium (Mg).
Therefore, the correct answer is Mg.
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