This video is meant for NIOS / National Institute of Open Schooling students studying NIOS-313 Chemistry for CL12. This video lecture covers the lesson on Atoms, Molecules and Chemical Arithmetic. This video has been curated by National Institute of Open Schooling experts and presented to you within our guidebooks and courses. To make the best of your studies, check out guidebooks by Gyaniversity Publications and the online courses by Gyaniversity Education.