Electrons in Atoms
Science

The pattern formed when light is separated into the electromagnetic frequencies it contains
Atomic emission spectrum
The pattern formed when light is separated into the electromagnetic frequencies it contains. Atomic emission spectrum. The atomic emission spectrum is a set of bright lines seen when elements emit light at specific wavelengths as electrons jump between energy levels.

The principle that states that electrons occupy orbitals of lowest energy first
Aufbau principle
The principle that states that electrons occupy orbitals of lowest energy first. Aufbau principle. The aufbau principle explains how electrons fill the lowest energy levels before moving to higher ones in an atom.

It is impossible to know both the velocity and position of a particle at the same time
Heisenberg uncertainty principle
It is impossible to know both the velocity and position of a particle at the same time. Heisenberg uncertainty principle. This principle states that there are limits to how precisely we can measure both the position and momentum of a particle simultaneously.

Electrons with the same spin must occupy each equal-energy orbital before electrons with opposite spins can occupy those orbitals
Hunds rule
Electrons with the same spin must occupy each equal-energy orbital before electrons with opposite spins can occupy those orbitals. Hund's rule. Hund's rule states that electrons will fill empty orbitals of the same energy with their spins aligned before pairing up.

One orbital can contain only two electrons, and they must have opposite spins
Pauli exclusion principle
One orbital can contain only two electrons, and they must have opposite spins. Pauli exclusion principle. This principle states that no two electrons in an atom can have the same set of quantum numbers, essentially meaning they can't be in the exact same state.

One of the major energy levels of an atom
Principal energy level
One of the major energy levels of an atom principal energy level. A principal energy level is the region around an atom's nucleus where electrons are likely to be found, with each level indicating a different distance from the nucleus and energy.

Number indicating the relative sizes and energies of atomic orbitals. it is assigned by the quantum mechanical model
Principal quantum number
Number indicating the relative sizes and energies of atomic orbitals. It is assigned by the quantum mechanical model. Principal quantum number. It is a number that tells us how far an electron is likely to be from the nucleus of an atom.

A model that treats electrons as waves to explain the properties of atoms
Quantum mechanical model
A model that treats electrons as waves to explain the properties of atoms. Quantum mechanical model. The quantum mechanical model describes how tiny particles, like electrons, behave in unpredictable ways that can't be explained by classical physics alone.