a. Proceeding from left to right across a period of the periodic table, the elements become (more, less) metallic. b. Proceeding from top to bottom in a group of the periodic table, the elements become (more, less) --Consider the generic equation for the reaction of the halogens, X, and Y, X2(g) + 2Y-(aq) → 2X-(aq) + Y2(g) Is X2 or Y, the more reactive halogen? Explain.9. a. Experimental Procedure, Part B.2. What commercially available compound is used to generate Cl, in the experiment? b. Experimental Procedure, Part B. The observation for the presence of the elemental form of the halogens is in a sol- vent other than water. Identify the solvent. c. Experimental Procedure, Part E.3. Identify the tests used to observe the periodic Pertrends in the chemical properties of the alkaline-earth metal ions.
