The Atomic AtomThe Atomic Atom

By: Hillary Pate By: Hillary Pate

Democritus of Abdera & AristotleDemocritus of Abdera & Aristotle

Democritus was born at Abdera, Democritus was born at Abdera, about 460 BCE.about 460 BCE.

Democritus could explain all changes in the world as changes in motion of the atoms, or changes in the way that they were packed together.

This was a remarkable theory which attempted to explain the whole of physics based on a small number of ideas and also brought mathematics into a fundamental physical role since the whole of the structure proposed by Democritus was quantitative and subject to mathematical laws.

Aristotle was born in 384 BCE. at Aristotle was born in 384 BCE. at Stagirus, a Greek colony Stagirus, a Greek colony

John DaltonJohn Dalton

He lived in Cumberland, He lived in Cumberland, England from 1766 to 1844.England from 1766 to 1844.

He was a chemist, and he He was a chemist, and he studied gases.studied gases.

Dalton's law says that pressure Dalton's law says that pressure of nonreactive gaseous mixture of nonreactive gaseous mixture is equal to a sum of pressures is equal to a sum of pressures of each, separate element of the of each, separate element of the mixture having the same mixture having the same

volume as the mixture has.volume as the mixture has.

Antoine LavoisierAntoine Lavoisier

Antoine-Laurent Lavoisier Antoine-Laurent Lavoisier was born August 26, was born August 26, 1743, the son of a 1743, the son of a wealthy Paris family.wealthy Paris family.