Use the periodic table to determine the electron configuration for zinc (Zn) and technetium (Tc) in noble-gas notation.

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

Ithink its called the coefficent.