H Propagation Step (1) The chlorine atom collides with a methane molecule and abstracts (removes)a H, forming another free radical and one of the products (HCI). First propagation step H H H-CE H-C. H-CI H H methane chlorine atom methyl radical hydrogen chloride Copyright 2005 Pearson Prentice Hall,Inc. 三> Chapter 4 6Chapter 4 6 Propagation Step (1) The chlorine atom collides with a methane molecule and abstracts (removes) a H, forming another free radical and one of the products (HCl). =>