1. Chemical Compounds

2. How is a chemical compound made? How is a chemical compound made? Mixture vs. chemical compound Mixture vs. chemical compound A compound is the result of two or more elements combining in definite proportions. A compound is the result of two or more elements combining in definite proportions. Elements that form compounds are said to be bonded together. Elements that form compounds are said to be bonded together.

3. Ionic Compounds Some compounds are comprised of positive and negative ions that are bound by their mutual attraction. Some compounds are comprised of positive and negative ions that are bound by their mutual attraction. An ion is an atom that has lost or gained an electron. An ion is an atom that has lost or gained an electron. A negatively charged atom is called an anion. A negatively charged atom is called an anion. A positively charged atom is called a cation. A positively charged atom is called a cation.

4. Metals will generally lose electrons to form cations. Metals will generally lose electrons to form cations. Non-metals will gain electrons to form anions. Non-metals will gain electrons to form anions. Some ionic compounds are made with polyatomic ions. Some ionic compounds are made with polyatomic ions. Polyatomic ions are made up of several elements joined together. Polyatomic ions are made up of several elements joined together. Ex. Nitrate- NO 3 Carbonate- CO 3 Ex. Nitrate- NO 3 Carbonate- CO 3 The goal in forming ionic compounds is to have a full outer electron shell and to have a net charge of Zero. The goal in forming ionic compounds is to have a full outer electron shell and to have a net charge of Zero.

5. Naming ions Cations: Just name the element Cations: Just name the element Na+ is just Sodium Na+ is just Sodium Try Li +, H +, Ca 2+ Try Li +, H +, Ca 2+ Anions: Add an ide ending to the element name Anions: Add an ide ending to the element name Cl - or Chlorine becomes Chloride Cl - or Chlorine becomes Chloride Try F -, I -, O 2- Try F -, I -, O 2- Putting it together Putting it together NaCl is Sodium Chloride NaCl is Sodium Chloride Try HBr, AlI 3, BeO Try HBr, AlI 3, BeO

6. Homework Read Page 414 and 415 Read Page 414 and 415 Checking up question 1-3 Checking up question 1-3

7. Covalent Compounds A Covalent bond is the result of electron sharing between atoms. A Covalent bond is the result of electron sharing between atoms. The sharing of electrons generally occurs when atoms involved can obtain a stable electron configuration. The sharing of electrons generally occurs when atoms involved can obtain a stable electron configuration. Elements particularly prone to covalent bonds include; Hydrogen, and Groups 4A, 5A, 6A, & 7A. Elements particularly prone to covalent bonds include; Hydrogen, and Groups 4A, 5A, 6A, & 7A. Atoms can share 1, 2, or 3 electrons Atoms can share 1, 2, or 3 electrons