General  Chemistry Links

https://www.periodicvideos.com/    (Informative link on Periodic table of elements  from the University of Nottingham).

An interesting video blog    https://ritholtz.com/2012/02/the-periodic-table-table/

Organic Chemistry Links:

https://www.organic-chemistry.org/

https://www2.chemistry.msu.edu/faculty/reusch/VirtTxtJml/Questions/problems.htm