Get the CBSE Class 9th Science chapter, Atoms and Molecules: Important topics and questions to prepare for CBSE Class 9 Science Examination, 2017-2018. This will provide you with a very clear idea ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

All matter in the universe is made up of different particles. In chemistry, there are two main types of particle that we need to know about. When atoms and molecules lose or gain electrons, they form ...