Pricing – Khan Academy is also free of cost. Such developments are still added to the interface time and again as their teaching style keeps getting improved. To keep the process fun and motivational, there are numerous rewards and badges that learners earn as they progress in their courses. The whole learning experience is very personalized, with the instructors directly engaging in the activity via video, audio, and a digital blackboard.įeatures – Over time, the website introduced new features that let users track their progress via visual means. It's thought that another one of these magic numbers lies just beyond the range of currently known elements, which means we could potentially discover some new elements that are relatively stable and extremely massive.Teaching – Khan Academy has distinguished itself from other online learning platforms with its distinct pedagogical approach. There are believed to be certain numbers/ratios that are inherently more stable.

Hence, larger atoms become more unstable. The ratio of neutrons to protons gradually increases to try to compensate, but this results in the neutrons getting more unstable themselves, resulting in more opportunity for weak forces to destabilize them. With all of that to consider, as you get larger and larger nuclei with more protons, the electromagnetic forces increase, as well as the distances in the nuclei, putting more strain on the nuclear forces holding it all together. Neutrons will help add to this nuclear force, but they tend to become unstable when they get into too great of concentration and the weak force will cause them to decay into protons. Fusion allows these protons to get close enough together for the stronger, yet short ranged, nuclear force to overpower the electromagnetic force.

The electromagnetic force of the protons wants to push them away from each other. There are several forces at work inside the nuclei of atoms.

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