Question

The principle that states that electrons fill from lower- to higher-energy subshells, thus, each sub shell will fill completely before electrons begin to enter the next one is known as ?

a. Pauli Exclusion Principle
b. Hund's Rule
c. Aufbau Principle
d. Heisenberg Uncertainty Principle

Answer 1

The Aufbau Principle is the rule that electrons fill from lower- to higher-energy subshells, each subshell being completely filled before moving to the next.

Step-by-step explanation:

The principle that states that electrons fill orbitals from lower to higher energy levels, making sure each subshell is completely filled before electrons begin to enter the next one, is known as the Aufbau Principle. The Aufbau Principle is key to determining the electron configuration for any particular atom. According to this principle, electrons occupy the subshell of lowest energy available, and only move to higher-energy subshells when the lower ones are filled to capacity. The order typically starts from 1s, then 2s, 2p, and so forth. This filling order is influenced by the Pauli Exclusion Principle and Hund's Rule, which further dictate electron arrangements within atom's orbitals.