Overview
Dalton's Atomic Theory, proposed in the early 19th century, revolutionized the understanding of matter by introducing the concept that all matter is composed of atoms. This theory established key principles, such as the indivisibility of atoms and the idea that atoms of different elements combine in...
Key Terms
Example: An oxygen atom is a basic unit of oxygen.
Example: Gold (Au) is an element.
Example: Water (H₂O) is a molecule made of hydrogen and oxygen atoms.
Example: Sodium chloride (NaCl) is a compound.
Example: The atomic mass of carbon is approximately 12 amu.
Example: One mole of carbon contains 6.022 x 10²³ carbon atoms.