Question

What does Hund's Rule state?

a. You must not sit next to another person on a bus.
b. Electrons enter the lowest available energy level.
c. An orbital can hold up to two electrons.
d. Electrons in similar energy orbitals remain unpaired as far as possible.

Answer 1

Hund's Rule states that orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron, and that each of the single electrons must have the same spin.

Step-by-step explanation:

Hund's Rule states that orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron, and that each of the single electrons must have the same spin.

For example, when adding electrons to the p orbitals in a sublevel, one electron is placed in each of the three orbitals before any orbital is doubly occupied. This arrangement helps to minimize the repulsive forces between electrons.

In summary, Hund's Rule determines the filling order of electrons within a set of orbitals and ensures that electrons with the same spin are in separate orbitals as much as possible.