4 янв 1913 г. - Niels Bohr
Описание:
According to Bohr’s atomic model, electrons move in definite orbits around the nucleus, much like planets circle the sun. These orbits, or energy levels, are located at certain distances from the nucleus.Добавлено на ленту времени:
Дата:
4 янв 1913 г.
Сейчас
~ 112 г назад