Question

What is aufbau principle and What is Hund's rule?​

Answer 1

Answer:

The Aufbau Principle states that lower energy orbitals fill before higher energy orbitals. ... Hund's Rule states that if 2 or more degenerate (i.e. same energy) orbitals are available, one electron goes into each until all of them are half full before pairing up .

Explanation:

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Answer 2

What is aufbau principle?

The Aufbau principle states that electrons fill lower-energy atomic orbitals before filling higher-energy ones.

By following this rule, we can predict the electron configurations for atoms or ions.

What is Hund's rule?

Hund's rule: states that 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.

The reason why Hund's rule is important is because you need to know the ground state of an element to then further determine the orbital/electron configuration of an ion.

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