In which grouping of the periodic table do the elements have simliar properties a only columns b both rows and columns c in the periods d only row answer fas

I would have to say [c]

but it could also be [b]

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.