NSD 2019: Science Characters (Covalent Bonds) Posted on April 5, 2019April 5, 2019 by Arundhati Dolas NSD 2019: Science Characters titled Amirchand & Fakirchand depicting the Covalent Bond. Idea by students of class 11, Sadhu, Shailendra, Yash, Deepak from Guardian High School.
