Do Now: Sodium chloride also known as table salt is an ionic compound, which is regularly consumed by many Americans. However pure sodium and pure chlorine.

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Presentation transcript:

Do Now: Sodium chloride also known as table salt is an ionic compound, which is regularly consumed by many Americans. However pure sodium and pure chlorine cannot be eaten. Why is sodium chloride safe to eat but pure sodium and pure chloride is not?

Objective: Be able to determine how elements will chemically react when forming an ionic compound Ionic Compound Notes Drawing Lewis Structures Agenda:

Ionic Bonds

Review: Valence Electrons Valence electrons are the electrons in the highest occupied energy level of the atom. Valence electrons are the only electrons generally involved in bond formation.

Na , 11 e

Na + , 10e

Review: Electron Dot Structure or Lewis Dot Diagram A notation showing the valence electrons surrounding the atomic symbol.

Elements within the same group have the same electron-dot structure.

Chlorine Atom  Chlorine Ion

Check your Neighbor When Na, (Z= 11) loses its valence electron, what element does its configuration look like ? Neon Potassium Beryllium Sodium C. discover the property called inertia.

Check your Neighbor When Na, (Z= 11) loses its valence electron, what element does its configuration look like ? Neon Potassium Beryllium Sodium C. discover the property called inertia.

A Stable Octet When the valence energy level is full, the atom is stable, less likely to react. Example: Noble (Inert Gases) Kr

Note Atoms tend to react in a way that would lead them to have a stable octet.

Naming cations (+). Use the name of the metal and the word ion. Example: Na+ Sodium ion.

Naming Anions(-) Use the name of the nonmetal with the ending –ide. Example: F- Fluoride

Ionic Compounds Are made up of: a metal and a nonmetal ion. polyatomic ions.

Naming Ionic Compounds, a First Look Example: NaF Sodium Fluoride

Example: Which of the following compounds are ionic? NaCl CO2 CO KF

Example: Which of the following compounds are ionic? NaCl CO2 CO KF

Some Common Ions

Bonding Elements that do not have a complete octet, tend to react. When the elements react bonds are formed.

Types of Bonds Ionic Metallic Covalent

Ionic Bonds Bonds that are formed by transfer of electrons from one element to the other. Each element (now an ion) will have a complete octet after the transfer of electrons.

Chemical Formula A representation of the kinds and number of atoms in a substance. Example: KCl, Mg Cl2