John Dalton

John Dalton was an English scientist in the early 1800s who is best known for developing the atomic theory. He proposed that all matter is made of tiny, indivisible particles called atoms, which combine in specific ratios to form compounds. Dalton also identified distinct types of atoms for different elements, such as hydrogen and oxygen. His work laid the foundation for modern chemistry and helped us understand chemical reactions at the atomic level. Additionally, Dalton studied gases and their behavior, contributing to our knowledge in physics and fundamental concepts in nuclear chemistry and atomic physics.