Before revision: If the adsorbate molecule in the precursor state is in close proximity to an adsorbate molecule that has already formed on the surface, it has a sticking probability reflected by the size of the SE constant and will either be the gaseous phase at a rate of kES.
After revision: adsorbed from the precursor state at a rate of kEC or will desorb intoIf the adsorbate molecule in the precursor state is in close proximity to an adsorbate molecule that has already formed on the surface, it has a sticking probability reflected by the size of the SE constant and will either be the gaseous phase at a rate of kES.