Chemistry 2nd Quarter Scientists

Democritus and Leucippus

Coined “atomos”, small indivisible particles

Epicurus

Different atoms have the same speed no matter the size

Robert Boyle

Known for writing the Sceptical Chymist, which laid the foundation for modern chemistry. Also known as the founder of Chemistry, he coined the term element

Joseph Priestly

Discovered “deplogisticated air” (mercury oxide) and discovered oxygen and its properties, demonstrating that plants produce oxygen during photosynthesis.

Antoine Laurent Lavoisier

Known as the father of modern chemistry. Discovered the role of oxygen in the process of combustion.

Joseph-Louis Proust

Established the law of definite proportions

John Dalton

Father of chemical theory, proposed the law of multiple proportions

Joseph John Thomson

Discovered the electron, made the plum pudding model

Robert Millikan

Oil drop experiment

Ernest Rutherford

Investigated alpha and beta rays using the gold foil alpha scattering experiment

Eugen Goldstein

Discovered proton, investigated discharge tubes, anode rays

James Chadwick

1935 Nobel Prize in Physics, discovered the neutron

Hans Geiger and Ernest Marsden

Nucleus

Niels Bohr

Theorized about electrons and made a model showing the different distances from the nucleus

Henry Moseley

Properties of an element are determined by the atomic number, not the atomic weight

Humphry Davy and Michael Faraday

Electrical nature of matter

Henry Becquerel

X-ray

Marie Curie

First woman to win a Nobel Prize. Found radioactivity that deflects in a magnetic field

William Roentgen

Penetrating rays that can travel through walls from a vaccum discharged tube

Paul Ulrich Villard

Similar to x-rays, more penetrating and has neither mass nor charge