An element in this group is attached to the alpha carbon of a carboxylic acid in the Hell-Volhard-Zelinsky reaction. In mass spec, (10[1])two peaks (10[1])of equal height two units apart characterize (10[1])a member of this group. (-5[1])An atom of a member of this group is displaced in a positive silver nitrate (10[1])test. (-5[1])Adding magnesium to hydrocarbons containing a member of this group (10[1])creates Grignard (“grin-yard”) reagents. These elements, which are denoted with an X in organic structures, can replace hydrogen since they both require one more electron for a full outer shell. (10[1])For 10 points, (10[1])name this group of elements with seven valence electrons, including (10[1])fluorine and chlorine. ■END■