Overview
Atomic theory is a fundamental concept in chemistry that describes the nature of matter as being composed of atoms. Each atom is made up of protons, neutrons, and electrons, and they combine in specific ways to form molecules and compounds. The law of constant proportions states that a given compoun...
Key Terms
Example: A hydrogen atom has one proton and one electron.
Example: Water (H₂O) is a molecule made of two hydrogen atoms and one oxygen atom.
Example: Oxygen (O) is an element essential for respiration.
Example: Sodium chloride (NaCl) is a compound formed from sodium and chlorine.
Example: Ionic and covalent bonds are two types of chemical bonds.
Example: In water, the mass ratio of hydrogen to oxygen is 1:8.
Related Topics
Key Concepts
AtomsMoleculesLaw of Constant ProportionsChemical Reactions