West Bengal State Exams
Free courses
Science & Technology
Lesson 5 of 5 • 0 upvotes • 12:38mins
Learn about valency and Aufbah principal
5 lessons • 50m
Atomic Structure (in Bengali)
2:41mins
13:35mins
Isotope, Isotone and Isobar (in Bengali)
12:32mins
Subshell, Molecules (in Bengali)
8:53mins
Valancy and Electron Configuration (in Bengali)
12:38mins