The previous page is sending you to https://interneturok.ru/lesson/physics/9-klass/stroenie-atoma-i-atomnogo-yadra-ispolzovanie-energii-atomnyh-yader/radioaktivnost-kak-svidetelstvo-slozhnogo-stroeniya-atomov-zaritskiy-a-n#mediaplayer.

 If you do not want to visit that page, you can return to the previous page.