Chemistry Class Announcements and Introduction to Atomic Theory

Flashcards covering key concepts from chemistry class announcements and early atomic theory discussions.

Dalton's Atomic Theory

Proposes that matter is composed of tiny indivisible particles called atoms.

Plum Pudding Model

JJ Thompson's model suggesting atoms contain positive and negative particles distributed throughout.

Rutherford's Gold Foil Experiment

Demonstrated that atoms have a dense, positively charged nucleus with electrons surrounding it.

Bohr Model

Niels Bohr's theory that electrons travel in specific orbits around the nucleus.

Quantum Mechanics

The theory that describes the behavior of matter and light on atomic and subatomic levels.

Electromagnetic Waves

Waves of energy that travel through space, characterized by wavelength and frequency.

Wavelength

The distance between successive crests of a wave, often measured in nanometers for light.

Frequency

The number of waves that pass a given point in one second, measured in Hertz.

Photon

A discrete packet of energy associated with electromagnetic radiation.

Electromagnetic Spectrum

The range of all types of light radiation, from radio waves to gamma rays.

Hydrogen Emission Spectrum

Distinct lines of color emitted by hydrogen gas when excited, revealing its atomic structure.

Balmer Series

The set of visible spectral lines emitted by hydrogen.

Rydberg Equation

Mathematical formula used to predict the wavelengths of spectral lines in hydrogen.