Contributors to Atomic Theory

Flashcards covering key contributors and their discoveries in atomic theory.

Niels Bohr's most important contribution in 1913 was __.

The quantum model of the atom.

James Chadwick is known for discovering the __ in 1932.

Neutron.

Marie Curie challenged the idea that the atom was __.

indivisible.

John Dalton proposed that all matter consists of tiny fundamental particles called __.

atoms.

Democritus developed the atomic theory, stating that everything is made up of __.

invisible particles called atoms.

Werner Heisenberg's uncertainty principle states that the more precisely you measure a particle's __, the less likely you will know its momentum.

position.

Antoine Lavoisier established the law on the __.

conservation of mass.

Dmitri Mendeleev published the first __ of Elements.

Periodic Table.

Robert Milikan used an oil drop experiment to measure the __.

fundamental unit of the electric charge.