Properties of four elements were determined and the location of each element on the periodic table of elements was identified as shown in the chart below. Which is most likely the element chlorine (Cl)?
A. Element W
B. Element X
C. Element Y
D. Element Z

D: Element Z

Explanation:

Chlorine can't conduct electricity and it is the 17 element so it would be on the left side which would only leave Element Z

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation: