Contributions to Atomic Theory Quiz

Greek philosopher who introduced the term 'Atomos' for indivisible matter.

The concept of indivisible particles proposed by Democritus.

Scientist who contributed to atomic theory around 1808, focusing on fixed proportions in matter.

Matter consists of atoms of specific elements in fixed proportions, differing from earlier beliefs.

Negatively charged particles discovered by J.J. Thomson that exist in atoms.

Scientist who discovered electrons around 1906, changing atomic models significantly.

Streams of electrons observed by J.J. Thomson during experiments.

An experiment that revealed atoms have a nucleus and are mostly empty space.

Scientist who identified the atomic nucleus around 1894.

The central core of an atom containing protons and neutrons.

Introduced the planetary model of electrons around 1922, refining atomic theory.

Model of the atom that depicts electrons orbiting the nucleus like planets.

Scientist who discovered neutrons in 1932, improving atomic structure understanding.

Neutral particles discovered by James Chadwick that exist in the atomic nucleus.

The basic framework that includes protons, neutrons, and electrons.

The consistent ratios in which elements combine, according to Dalton.

Positively charged particles used in Rutherford's experiments to probe atomic structure.

Electrons carry a negative electric charge.

Positively charged particles found in the atomic nucleus.

The development and refinement of the understanding of atoms over time.

Concept that most of the atom's volume is empty, as shown by Rutherford's experiments.

Model depicting a cloud of positive charge with dispersed electrons, introduced by Thomson.

His findings led to the understanding that atoms have a dense nucleus.

Focus on electron orbits, bringing clarity to atomic models.

The discovery of neutrons significantly enhanced understanding of atomic structure.

Chronological progression of ideas about atomic structure from Democritus to Chadwick.

Origin of the concept of atoms, posed by Democritus in ancient Greece.

Dalton's principle that elements combine in specific ratios to form compounds.

The study of atomic components, including electrons, protons, and neutrons.

Key scientists like Democritus, Dalton, Thomson, Rutherford, Bohr, Chadwick who advanced atomic understanding.