+7 (727)
344 95 95
Please email us
English
Русский
Қазақша
Subscribe
Profile
Subscription
Balance
Watch history
My library
Notifications
My contests
Поурочные планы
Logout
Русский
Қазақша
Online Mektep
Authorization
Home
Subjects
Contests
Subscribe
Chemistry course
Main
Courses on International standards
Chemistry course
General Chemistry
Atoms and molecules
Atoms and molecules
Atomic theories
Continuous and line spectra
The Bohr model of the atom (2)
Аtomic spectra
The Bohr model of the atom (1)
Isotopes
Radioactivity
The structure of the atom
The electron configuration of an atom
Quantum numbers
Electron energy levels in an atom
