Question

question 1. element x reacts with chlorine to form an ionic compound that has the formula xcl₂. to which group on the periodic table could element x belong?

○ group 1
○ group 2
○ group 13
○ group 15

Explanation:

In ionic compounds, the charges balance. Chlorine (Cl) typically has a -1 charge. In \( \text{XCl}_2 \), there are 2 Cl⁻ ions, so the total negative charge is \( 2\times(-1)= -2 \). Thus, element X must have a +2 charge to balance this (since the compound is neutral). Elements in Group 2 of the periodic table typically lose 2 electrons to form \( \text{X}^{2+} \) ions. Group 1 elements form \( \text{X}^+ \), Group 13 forms \( \text{X}^{3+} \), and Group 15 elements often form negative ions or have different positive charges (not +2). So X belongs to Group 2.

Answer:

B. Group 2