As the Class 10th Science board exam nears, students all over the country are always in a time race to cement their grasp on the basic concepts, with the foremost being the periodic table. This is the ...

To the three requirements of a modern Periodic Table, as stated by A. A. Clifford 1, must be added a fourth, namely, that it should be in as close accord as possible with chemical facts, and above all ...

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 ...