How does a lithium cation compare to a lithium atom
a. the cation is larger
b. the cation has the same radius
c. the cation is smaller
d. the cation has the same charge

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.

Electrons are emitted