CHEM 110 Chapter Notes - Chapter 234: Solution, Avogadro Constant, Atomic Number

• School: McGill University
• Department: Chemistry
• Course: CHEM 110
• Professor: Bryan Sanctuary

Document Summary

Chem 110 chapter 2, 3, 4 smart notes. Chapter 2: atoms and the atomic theory: early chemical discoveries and the atomic theory. The total mass of substances present after a chemical reaction is the same as the total mass of substances. All samples of a compound have the same composition- the same proportions by mass of the constituent elements. The 3 assumptions of this theory: each chemical element is composed of minute, indivisible particles called atoms. Atoms can be neither created nor destroyed during a chemical change: all atoms of an element are alike in mass (weight) and other properties but the atoms of one element are different from those of all other elements. In each of their compounds, different elements combine in a simple numerical ratio, for example, one atom of a to one of b (ab), or one atom of a to two of.