This document discusses three main types of chemical bonds: ionic bonds, covalent bonds, and metallic bonds.
1. Ionic bonds form between metals and nonmetals by the transfer of electrons from one atom to another, resulting in positively and negatively charged ions.
2. Covalent bonds form between nonmetals of similar electronegativity by the sharing of electron pairs between atoms.
3. Metallic bonds form between metallic elements and involve a sea of electrons that hold the metal atoms together strongly.
This document discusses three main types of chemical bonds: ionic bonds, covalent bonds, and metallic bonds.
1. Ionic bonds form between metals and nonmetals by the transfer of electrons from one atom to another, resulting in positively and negatively charged ions.
2. Covalent bonds form between nonmetals of similar electronegativity by the sharing of electron pairs between atoms.
3. Metallic bonds form between metallic elements and involve a sea of electrons that hold the metal atoms together strongly.
This document provides instructions and vocabulary for a telephone conversation lesson. It includes:
1) The goal of making and answering phone calls and expressing related phrases like "call back", "hang up", and "leave a message".
2) A list of new vocabulary words and their meanings related to phoning.
3) A note to listen to a sample conversation on CD to understand the expressions and complete example sentences.
4) A brief grammar lesson on using the articles "a" and "the" with examples specific to leaving phone messages.
5) A homework assignment to write a short telephone conversation.
