33
/fr/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 1, 2025
3741311
342631
2
Public Timelines
FAQ Obtenir le Premium

31 déc. 1912 - Niels Bohr

Description:

Planetary Model
Electrons orbited the nucleus in fixed orbits of differing energy levels.
Positive - Stable electron orbits with emission spectra.
Negative - Doesn't work for heavier elements.

Ajouté au bande de temps:

Date:

31 déc. 1912
Maintenaint
~ Il y a 112 ans