1. Chemical Bonds and Compounds CHAPTER the BIG idea CHAPTER OUTLINE The properties of compounds depend on their atoms and chemical bonds. Elements combine to form compounds. 2.1 Chemical bonds hold compounds together. 2.2 Substances’ properties depend on their bonds. 2.3 NEW CHAPTER

2. VOCABULARY KEY CONCEPT CHAPTER HOME Elements combine to form compounds. 2.1 SECTION OUTLINE SECTION OUTLINE subscript chemical formula Compounds have different properties from the elements that made them. Atoms combine in predictable numbers. calcium (Ca)chlorine (Cl 2 ) calcium chloride (CaCl 2 ) = = + +

3. VOCABULARY KEY CONCEPT CHAPTER HOME chemical formula 2.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Elements combine to form compounds. An expression that shows the number and type of atoms joined in a compound. subscript chemical formula

4. VOCABULARY KEY CONCEPT CHAPTER HOME A number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound. subscript 2.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Elements combine to form compounds. subscript chemical formula

5. VOCABULARY KEY CONCEPT CHAPTER HOME Chemical bonds hold compounds together. 2.2 SECTION OUTLINE SECTION OUTLINE Chemical bonds give all materials their structure. Chemical bonds between atoms involve electrons. Atoms can transfer electrons. Atoms can share electrons. ionic bond molecule polar covalent bond covalent bond ionic bond covalent bond polar covalent bond

6. VOCABULARY KEY CONCEPT CHAPTER HOME The electrical attraction between a negative ion and a positive ion. ionic bond 2.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Chemical bonds hold compounds together. ionic bond molecule polar covalent bond covalent bond

7. VOCABULARY KEY CONCEPT CHAPTER HOME A pair of electrons shared by two atoms. covalent bond 2.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Chemical bonds hold compounds together. ionic bond molecule polar covalent bond covalent bond

8. VOCABULARY KEY CONCEPT CHAPTER HOME A group of atoms that are held together by covalent bonds so that they move as a single unit. molecule 2.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Chemical bonds hold compounds together. ionic bond molecule polar covalent bond covalent bond

9. VOCABULARY KEY CONCEPT CHAPTER HOME The unequal sharing of electrons between two atoms that gives rise to negative and positive regions of electric charge. polar covalent bond 2.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Chemical bonds hold compounds together. ionic bond molecule polar covalent bond covalent bond

10. VOCABULARY KEY CONCEPT CHAPTER HOME Ionic and covalent bonds give compounds certain properties. Substances’ properties depend on their bonds. 2.3 SECTION OUTLINE SECTION OUTLINE metallic bond Bonds can make the same element look different. Metals have unique bonds. copper graphite fragment diamond fragment

11. VOCABULARY KEY CONCEPT CHAPTER HOME A certain type of bond in which nuclei float in a sea of electrons. metallic bond 2.3 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Substances’ properties depend on their bonds. metallic bond

12. VOCABULARY KEY CONCEPT CHAPTER HOME I. Elements combine to form compounds. A. Compounds have different properties from the elements that make them. B. Atoms combine in predictable numbers. 2.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Elements combine to form compounds. 1. Chemical Formulas 2. Same Elements, Different Compounds subscript chemical formula

13. VOCABULARY KEY CONCEPT CHAPTER HOME 2.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Chemical bonds hold compounds together. II. Chemical bonds hold compounds together. A. Chemical bonds between atoms involve electrons. B. Atoms can transfer electrons. 1. Covalent Bonds 2. Polar Covalent Bonds C. Atoms can share electrons. D. Chemical bonds give all materials their structures. 1. Ionic Bonds 2. Names of Ionic Compounds 1. Ionic Compounds 2. Covalent Compounds ionic bond molecule polar covalent bond covalent bond

14. VOCABULARY KEY CONCEPT CHAPTER HOME III. Substances’ properties depend on their bonds. A. Metals have unique bonds. B. Ionic and covalent bonds give compounds certain properties. 2.3 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Substances’ properties depend on their bonds. C. Bonds can make the same element look different. metallic bond