Lewis Dot Diagrams Lewis Dot Diagrams Since atoms

Lewis Dot Diagrams

Lewis Dot Diagrams • Since atoms are only concerned with having a full outer/valence shell. • It is sometimes more convenient to look at the valence shell. • Electrons in the valence shell are called valence electrons.

Lewis Dot Diagram • A Lewis Dot Diagram is a diagram of the atom where only the valence electrons are drawn. • Valence electrons are represented by dots. • The nucleus of the atom is represented by the atom’s symbol only.

Lewis Dot Diagrams • Since a full valence shell normally consists of 8 electrons, Lewis dot diagrams are drawn with two dots on the top, bottom, left and right. • We only draw electrons for the outer shell.

• • Sulfur has 16 electrons. K=2 L= 8 M = 6 (Valence shell) • Draw the Lewis Dot Diagram S

The Periodic Table • We’ll be talking about this next class. • Here are some basics to help familiarize yourself with the table and help you to complete your assignment.

Metals are found on the left hand side Non-metals are on the right hand side The “staircase” shows metalliods

Each column is called a group/family Each row is called a period

Periodic Table Basics • Page 7 • Questions on page 8 and the “periodic table” you make will be handed in for marks. • You have the rest of the class to work on it…… Let me know if you need help.