Choose the appropriate word(s) from the bracket [+2, ethane, tetrahedral, square planar, zero, dry…

Choose the appropriate word(s) from the bracket [+2, ethane, tetrahedral, square planar, zero, dry cell, nickel-cadmium cell, propane, Wolff-Kishner, Stephen, completely filled, incompletely filled, paramagnetic, diamagnetic]: ____ is an example of a primary cell but ____ is an example of a secondary cell.