John Dalton gave the atom solid footing as an elementary chemical object through the development of Dalton's Atomic Theory in the early 1800s. Though modern atomic theory is more complex than Dalton's theory, the substance of his theory remains valid today, according to the Indiana University Northwest Chemistry 101 website.
Law of Conservation of Matter
The law of conservation of matter takes center stage in Dalton's Atomic Theory and says that when a chemical reaction takes place, matter is neither created nor destroyed. It implies that when a chemical reaction takes place, atoms are simply rearranged.
Law of Constant Composition
The law of constant composition, Dalton's second law, notes that multiple samples of any pure chemical compound always contain the same percent by mass of each element making up the compound. Dalton also viewed this law as proof that elements existed in the form of atoms.
Dalton's Atomic Theory
Using the basis of the laws of conservation of matter and constant composition, Dalton developed an atomic theory delineating five basic laws, of which the remaining three decry that atoms of a particular size are alike and atoms of different elements are different from one another. Finally, his theory indicates that a chemical reaction involves neither the union nor the separation of individual atoms.
- Photo Credit atom image by Oleg Verbitsky from Fotolia.com
About Rutherford's Atomic Theory
Rutherford's Atomic Theory was a revolutionary theory regarding the nature of atomic structure that varied significantly from past theories on the same...
James Chadwick Atomic Theory
James Chadwick, an English physicist born in Cheshire, proved the existence of neutrons in 1932. As uncharged particles in atoms, neutrons play...
Einsteins Atomic Theory
Albert Einstein is considered one of the fathers of modern atomic theory through his works that explained and provided the first evidence...
Five Types of Atomic Models
Each successive model for atomic anatomy and construction was based on the previous one. Philosophers, theorists, physicists and scientists progressively developed the...
List of the Atomic Theories
Atomic theory has evolved since ancient times. Scientists have taken the hypothesis of Greek scholars and have built on it with their...