Why are models used to represent atoms? O A. Atoms are too small to see.
O B. Models are completely accurate.
O C. Models explain new evidence.
O D. Models never change over time.

A because that is ture and we use a model of the atom to explain what an atom does

A. We can’t see actual atoms, so we use bigger models to grasp more information

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.