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.
Related Topics
Modern Atomic Theory
An updated version of atomic theory that includes discoveries about subatomic particles.
intermediatePeriodic Table of Elements
A tabular arrangement of elements based on their atomic number and properties.
beginnerStoichiometry
The calculation of reactants and products in chemical reactions.
intermediateChemical Bonding
The study of how atoms bond to form compounds.
intermediateGas Laws
The laws that describe the behavior of gases under various conditions.
advancedKey Concepts
Atoms are indivisibleAtoms of the same element are identicalAtoms combine in whole number ratiosChemical reactions involve rearrangement of atoms