atomic structure ,10 most tricky and difficult mcqs (9701) Published 2 years ago • 3.7K plays • Length 18:41 Download video MP4 Download video MP3 Similar videos 18:41 10 most tricky and difficult mcqs of atomic structure and electronic configuration 0:48 how small are atoms? 5:35 a better way to picture atoms 23:40 50,000,000x magnification 2:11 this is the first image of an atom! 27:26 periodicity , 10 most tricky and difficult mcqs