, Chapter 2
Atoms, Molecules, and Ions
45
,2.1 Dalton’s Atomic Theory
§ Objectives:
• List the four postulates of
Dalton’s atomic theory
• Relate the laws of constant
composition, multiple
proportions, and conservation of
mass to Dalton’s atomic theory
46
, Dalton’s Atomic Theory
§ Postulates
1. Matter is composed of atoms.
Atoms are the smallest units of
an element that have all the
properties of that element.
2. An element is composed
entirely of one type of atom.
47
Atoms, Molecules, and Ions
45
,2.1 Dalton’s Atomic Theory
§ Objectives:
• List the four postulates of
Dalton’s atomic theory
• Relate the laws of constant
composition, multiple
proportions, and conservation of
mass to Dalton’s atomic theory
46
, Dalton’s Atomic Theory
§ Postulates
1. Matter is composed of atoms.
Atoms are the smallest units of
an element that have all the
properties of that element.
2. An element is composed
entirely of one type of atom.
47
