Atomic Theory.
John Dalton discovered the atom in 1803. He didn't really discover the atom. He developed a theory of matter that involved atoms. Atoms were proved to exist later.
in 1803
1803
"1803"
John Dalton in 1803
The first person to develop the first model of the atom in 1803 was John Dalton.
john dalton developed the atomic theory , which he published in 1803
in 1803 by John Dalton
John Dalton introduced the basic concepts on which the modern periodic table is based.
John Dalton formulated his atomic theory in the early 19th century, around 1803. This theory proposed that all matter is made up of tiny indivisible particles called atoms.
1800 to 1803 I'm not sure of the exact year
john dalton developed the atomic theory , which he published in 1803