Is an element compound or mixture that can contain more than one type of atom?

The element is the only one that cannot contain more than one type of atom. Compounds and mixtures usually have more than one type of atom.

3авиипп

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.