How Did Dalton Describe the Atom
He defined an atom to be a ball-like structure as the concepts of atomic nucleus and electrons were unknown at the time. Daltons atomic theory also stated that all compounds were composed of combinations of these atoms in defined ratios. John Dalton Biography Discoveries Atomic Model Facts Britannica There were of course no scientific instruments at that time but he reasoned philosophically that there had to be a smallest unit of matter which he called the atom. . Based on all his observations Dalton proposed his model of an atom. The first part of his theory states that all matter is made of atoms which are indivisible. This remained true until 1803 when an English chemist John Dalton came up with actual experimental evidence for the existence of atoms. All atoms of an element are identical. While all atoms of an element were identical different elements had atoms of. John Dalton was an English chemist in the late 18th ce...