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5.
A rule
saying a single
electron must
occupy cach orbital
in a sublevel before
they pair up with
an electron​


Sagot :

Answer:

hund's rule

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.

Answer:

Hund's rule

Explanation:

Hund's rule: every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin