Chemistry subjects were first given to us during the middle school (junior high school) period. in this time we are taught about compounds that exist in everyday life and given a lot of explanation about atoms and sub-atoms. to find out and remember all the compounds that have been given we must carry notes or by memorizing them. but now you can bring notes about these atomic and subatomic compounds anytime and anywhere without carrying a thick and large book. besides that there are still many lessons about our SMP material available.