To read the chapter notes and get the previous year's most important questions of this chapter on your smartphone, download the Avanti Gurukul App now: http://go.avanti.in/ytdresapp Continuing our series on How to score 90 marks in Science board exams, we bring the next revision video, i.e. Periodic Classification of Elements If you have missed any previous video of this series, click here: https://www.youtube.com/playlist?list=PL3aIa9xtFdj3bHTfRe0X4TBmxm2XtjTmP Looking at previous years’ questions of Periodic Classification of elements, we suggest that it is an important chapter from exam point of view, as definitely a 3 or a 5 mark question is asked from this chapter every year. The concepts that are going to be discussed in this article are: 1. Dobereiner’s Triads 2. Newlands Law of Octaves 3. Mendeleev’s Periodic Table 4. Modern Periodic Table 5. Trends in Modern Periodic Table 6. Previous Years’ Questions If you missed any previous video of this series, click here to watch the complete playlist: https://www.youtube.com/playlist?list=PL3aIa9xtFdj3bHTfRe0X4TBmxm2XtjTmP If you like this video, subscribe to our channel for more videos of this series: https://www.youtube.com/avantigurukul To know more visit our website on https://www.avanti.in/ Like us on Facebook @ https://www.facebook.com/avantilearningcentres/ Follow us on Twitter @ https://twitter.com/AvantiLC