Solution: Identify the group or family to which each of the following elements belongs by placing the letter corresponding to the group in the blank to the left of the element.   _____ potassium              

Identify the group or family to which each of the following elements belongs by placing the letter corresponding to the group in the blank to the left of the element.

_____ potassium                              A.  Halogen

 _____ fluorine                                  B.  Transition metal

 _____ magnesium                           C.  Alkali metal

 _____ nickel                                     D.  Alkaline earth metal