1. Electronic Configuration in Chemistry

Electronic Configuration

Arrangement of electrons in atomic or molecular orbitals.

Aufbau Principle

Electrons fill orbitals from lowest to highest energy.

Madelung's Rule

Order of filling subshells based on n + l values.

Klechkowski's Rule

Filling order for subshells with same n + l.

Subshell

A division of electron shells with specific energy levels.

Orbital

Region in an atom where electrons are likely found.

Ground State

Lowest energy state of an atom or molecule.

Electron Configuration Notation

Symbolic representation of electron distribution.

Oxygen Molecule Configuration

Electronic configuration: σ1s² σ1s² σ2s² σ2s² σ2pz² π2px²=π2py² π2px¹=π2py¹.

Nitrogen Molecule Configuration

Electronic configuration: (σ1s)²(σ1s)²(σ2s)²(σ2s)²(π2px²=π2py)⁴(σ2pz)².

Fluorine Molecule Configuration

Electronic configuration: (σ2s)²(σ2s)²(σ2pz)²(π2px)²(π2py)²(π2px)²(π*2py)².

Shell Model

Model describing arrangement of protons and neutrons.

Atomic Number (Z)

Number of protons in an atom's nucleus.

Electron

Negatively charged subatomic particle in atoms.

Proton

Positively charged subatomic particle in atomic nucleus.

Neutron

Neutral subatomic particle in atomic nucleus.

Molecular Orbital Theory (MOT)

Theory explaining electron configurations in molecules.

Orbital Energy Levels

Energy states of electrons within an atom.

16 Electrons

Threshold for specific molecular orbital configurations.

Chemical Symbol

One or two-letter notation for elements.

Electron Configuration of Atoms

Specific arrangement of electrons in an atom.

Scanned Reference Books

Digitized texts for additional learning resources.

Learning Outcomes

Goals for student knowledge after module completion.