Z.) Use the periodic table to separate these 12 elements into 6 pairs of elements having __ chemical properties. [Ca, K Ga, P ,SI, Rb , B, Sr, Sn, Cl , Br, BI] 1.) ca.5r 2.) __ __ 3.) __ __ 4.) 5.) __ __ 6.) __ __

To separate these 12 elements into 6 pairs of elements having similar chemical properties, we can group them based on their position in the periodic table and their chemical reactivity.<br /><br />1.) Ca, Sr<br />2.) K, Rb<br />3.) Ga, B<br />4.) P, Cl<br />5.) Si, Sn<br />6.) Br, I<br /><br />Explanation:<br />1.) Ca (Calcium) and Sr (Strontium) are both alkaline earth metals and have similar chemical properties.<br />2.) K (Potassium) and Rb (Rubidium) are both alkali metals and have similar chemical properties.<br />3.) Ga (Gallium) and B (Boron) are both in the same group (Group 13) of the periodic table and have similar chemical properties.<br />4.) P (Phosphorus) and Cl (Chlorine) are both in the same group (Group 15) of the periodic table and have similar chemical properties.<br />5.) Si (Silicon) and Sn (Tin) are both in the same group (Group 14) of the periodic table and have similar chemical properties.<br />6.) Br (Bromine) and I (Iodine) are both halogens and have similar chemical properties.