How many known elements have atoms, in their ground state, with valance electrons whole quantum numbers are n=6 and l=1 a.86
b.6
c.8
d.81

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.