Chemistry: Atoms, Molecules and the Periodic Table

• Chapter 1.1 includes discussions of Dalton's atomic model, atoms, atomic theory, and representing atoms as balls.
• Chapter 1.2 involves explanation of molecules and how they are represented.
• Chapter 1.3 is about elements and their combinations.
• Chapter 1.4 introduces the periodic table of elements, this includes the information contained in each element's box.

Dalton's Atomic Theory

• Matter consists of indivisible particles termed atoms.
• Atoms of a specific element share identical mass and properties.
• Compounds arise from the combination of two or more different types of atoms.
• A chemical reaction involves the rearrangement of atoms.

Molecules

• Molecules are collections of atoms connected by chemical bonds.
• Representation of molecules can be achieved through: structural formulas, ball-and-stick models, and space-filling models.

Elements and Combining Elements

• Elements are pure substances containing only one type of atom and cannot be broken down through chemical means.
• Elements combine to make compounds through chemical reactions.

Periodic Table Organization

• The periodic table is arranged by increasing atomic number.
• Elements in the same group, i.e. vertical column, exhibit similar chemical properties.
• Elements can be classified as metals, nonmetals, and metalloids based on their distinct properties.

Properties of Elements

• Metals are generally shiny, conductive, and malleable.
• Nonmetals tend to be dull, non-conductive, and brittle.
• Metalloids possess properties that fall between those of metals and nonmetals.

Discussions of Dalton's atomic model, atoms, atomic theory, and representing atoms. Explanation of molecules and their representation. Introduction to elements and the periodic table.