b) Fiplain the inend you chose in patt (a) for the alkali metaly. Kxgiess reasening im kerats of dibfance from the nacleus. 2b) Afkali motals veras alkaline earth metsls: Express the difference between these metals in lerms of number of vulence electrons abd relate it to energ. Parr 2t Solabiling of Allaflne Earth Metal Compounds 1. Place the spot plate on top of a sheet of black paper: 2. Referring to Data Table B as a gaide (see below), use a clean pipet to add 4 drops of each alkaline carth metal solation to the appropriate wells, as follows: a) 0.1M magnesiam chloride to wells A1, BI, and Cl b) 0.1M calcium chloride to wells A2,B2, and C2 c) 0.1M strontium chloride to wells A3,B3, and C3 d) 0.1M barium chloride to wells A4,B4, and CA e) Unknown to wells A5, B5, and CS 3. Referring to Data Table B as a guide, use a clean pipet to add 4 drops of each testing solution to the appropriate wells, as follows: a) I M sodiam carbonate to wells AI=A5 b) I M sodium sulfate to wells BI=B5 c) 0.2M potassium iodate to wells Cl-CS 4. Record observations in Data Table B as followst, if a solid foms in a well, write PPT (precipitate) in the appropriate circle in the data table. If no solid is observed, write NR (no reaction) in the appropriate circle in the dafa table. Dara Fadke B. Sofebility of Alkaline Earth Metal Compounds IMPONTANT: RECORD THE RESULTS FROM THE EXPERIMENT IN THE CORRECT CIRCLES BHLOW. HPT if precipitate furms (aqueous solid) or NR if nothing happens (clear solution). Post-lab Questions: 1. Circle the metal that formed the most precipitate. MgCa,SrBa 2. Circle the metal that formed the least precipitate. Mg Ca, Sr Ba 3. Complete the following statement by circling the correet words. Alkaline metals increase or decrease in solubility going up or down the periodic table. 4. Which radatian type do you predict would have ain intermediate hevel of interation with matter? Consider electrisal charges miss, and speed. Esplaie your reassas. 5. For eacb of the folsawing elenenents, include the number of valence electrons cach one of thems has and a Lewis electron dot structure of eacl. Excrcises Recail that alpha decay is defined by the following equation: 2A+(22)Y+(A4)24Het Fxienples: the alpha decay of radod is Note that the botrom number 84 is the new aromic number after the decay has occurred and dictates which elececrit is produced and which symbol should appear in the prodact (V). Thus, Po is the element that has the atamis neimbetr 84