Atomic Theory Timeline and Brand Asset Guidelines

Vocabulary practice flashcards covering historical milestones, scientists, experiments, and models in atomic theory, as well as typography system hierarchy specifications.

ritus

Proposed in 400 BC through thought experiments that matter is made up of tiny, indivisible particles called atoms.

alton

Created the 1st modern chemical atomic theory in 1803 and introduced the Billiard Ball Model.

Billiard Ball Model

The atomic model developed by alton in 1803 representing his modern chemical atomic theory.

omson

Discovered the electron in 1897, demonstrating that atoms contain smaller particles through the Cathode Ray Tube Exp and Plum Pudding Model.

Cathode Ray Tube Exp

The experiment conducted by omson in 1897 that led to the discovery of the electron.

Plum Pudding Model

The atomic model proposed by omson in 1897 following the discovery that atoms contain smaller subatomic particles.

Millikan

Scientist who measured the charge of the electron in 1909 using the Oil Drop Experiment.

Oil Drop Experiment

The experiment conducted by Millikan in 1909 to measure the charge of the electron.

Rutherford

Discovered the small, dense, positive nucleus in 1911 using the Gold Foil Experiment and established the N Model.

Gold Foil Experiment

The 1911 experiment by Rutherford that provided evidence for a small, dense, positive atomic nucleus.

ohr

Suggested in 1913 that electrons occupy fixed energy levels, introducing the Bohr/Planetary Model.

Bohr/Planetary Model

The 1913 atomic model by ohr proposing that electrons occupy fixed, discrete energy levels.

e Brogile

Proposed in 1924 that electrons can behave like waves, forming the Wave-Particle Model.

Wave-Particle Model

The atomic framework proposed by e Brogile in 1924 stating that electrons exhibit wave-like behavior.

chrödinger

Developed the quantum mechanical model of the atom and the Electron Cloud Model in 1926.

Heisenberg

Developed the Uncertainty Principle in 1927 in connection with the Quantum Mechanical M.

Uncertainty Principle

The fundamental quantum mechanical principle developed by Heisenberg in 1927.

Chadwick

Discovered the neutron in 1932 using the Berylliu Experiment and established the Neutron Model.

Berylliu Experiment

The experiment carried out by Chadwick in 1932 that led to the discovery of the neutron.

Electron Cloud Orbital M

Late 1900s atomic model that describes electrons as occupying complex 3D orbitals.

Quark Model

A model arising from particle experiments in mic Physics during the 2000s+ demonstrating that protons and neutrons are composed of quarks.

Title Font

DM SERIF DISPLAY at a size of 60pt in the brand assets typographic system.

Heading 1

DM SERIF DISPLAY at a size of 36pt in the brand assets typographic system.

Heading 2

DM SERIF DISPLAY at a size of 24pt in the brand assets typographic system.

Heading 3

DM SANS — MEDIUM at a size of 18pt in the brand assets typographic system.

Body

DM SANS — NORMAL at a size of 12pt in the brand assets typographic system.

Caption

DM SANS — NORMAL at a size of 10pt in the brand assets typographic system.