Friedrich Hund

German physicist. I worked on atoms and molecules. There's a rule named after me, too.

[Friedrich Hund @FriedrichHund_]

#FRIEDRICHHUND

[Friedrich Hund @FriedrichHund_]

Essentially, I said that electrons fill the lowest energy levels first before moving to the higher energy levels.

[Friedrich Hund @FriedrichHund_]

Again, my rule-- correct vs. incorrect.

[Friedrich Hund @FriedrichHund_]

More information regarding my rule:

[Friedrich Hund @FriedrichHund_]

Now here's Hund's rule represented using elements such as Boron, Nitrogen, etc.

[Friedrich Hund @FriedrichHund_]

This rule is important b/c it shows, in a simple way, how usual energy interactions dictate the ground state of an atom.

[Friedrich Hund @FriedrichHund_]

Some more information on my rule:

[Friedrich Hund @FriedrichHund_]

A visual representation of "Hund's Rule of Maximum Multiplicity"

[Friedrich Hund @FriedrichHund_]

themselves to occupy separate orbitals with same spin as far as possible. (Tweet 2/2)

[Friedrich Hund @FriedrichHund_]

Hund's rule of maximum multiplicity:in a set of orbitals having same energy (degenerate orbitals), the electrons distribute (Tweet 1/2)

[Friedrich Hund @FriedrichHund_]

But I'd say my most important accomplishment would be "Hund's Rule of Maximum Multiplicity" which is often associated with chemistry.

[Friedrich Hund @FriedrichHund_]

In addition, in 1926 I discovered the "tunneling effect"-- meaning that electrons can act like both particles and waves.

[Friedrich Hund @FriedrichHund_]

I've published many essays and over 250 papers, and I've also heavily contributed to quantum theory about the structure of the atom.