1 CHEMICAL BONDING

2 Types of Bonds Ionic—transfer of 1 or more electrons from one atom to another (one loses, the other gains) forming oppositely charged ions that attract one anotherIonic—transfer of 1 or more electrons from one atom to another (one loses, the other gains) forming oppositely charged ions that attract one another

3 Types of Bonds Covalent—some valence electrons shared between atomsCovalent—some valence electrons shared between atoms

4

5 Chemical Bonding Vocabulary (Ch. 7 & 8) 1.Chemical formula 2.Ionic bonds 3.Ionic compounds 4.Metallic bonds 5.Octet rule 6.Valence electrons 7.Covalent bond 8.Diatomic molecule 9.Double covalent bond 10.Hydrogen bond 11.Molecular formula 12.Polar bond 13.Polyatomic ion 14.Single covalent bond 15.Triple covalent bond WordDefinitionMy Own WordsPic. Or Ex.

CHEMICAL BONDING IONIC COMPOUNDS

Balance the charges Use “-ide” at the end of nonmetal Roman numeral

1+ 2+

ElementsBalance ChargesFormulaName Calcium and Fluorine Aluminum and Oxygen

QR CODE REVIEW Use the flow chart to predict names and formulas. Choose your answer and scan the code to check. Fill in the answer sheet as you go.

Write or summarize the question Write your answer Show your work or explain your reasoning for the correct answer

1. What is the name for NaCl? * sodium chloride B. sodium chlorine C. sodium I chloride

2. What is the correct formula for iron (III) chloride? A. FeClB. Fe 3 Cl* FeCl 3

3. What is the correct formula for Al +3 and Cl -1 ? A. Cl 3 Al B. AlCl* AlCl 3

4. What is the name for CaF? * calcium fluoride B. calcium II fluorine C. calcium II fluoride

5. What is the correct formula for compound formed when a sodium ion combines with a fluoride ion? A. NaF 2 B. NaFC. Na 2 F

6. What is the correct formula for copper (II) chloride? A. CuClB. Cu 2 Cl* CuCl 2

7. What is the correct formula for calcium oxide ? A. CaO 2 * CaOC. Ca 2 O

8. What is the name for MgS? A. magnesium II sulfide B. magnesium sulfur * magnesium sulfide

9. What is the correct formula for silver chloride? A. SiCl * AgClC. AgCl 3

10. What is the formula formed by a potassium ion and a sulfur ion? * K 2 S B. KS C. KS 2

11. What is the compound formed from Ca +2 and F -1 ? * calcium fluoride B. calcium II fluorine C. calcium II fluoride

12. What is the formula formed by Li +1 and O -2 ? * Li 2 O B. LiO C. LiO 2

TRANSITION METALS Can have more than one charge Ex: chromium (II) and chromium (III) chromium (II) oxidechromium (III) oxide

Special Ions Polyatomic Ion A tightly bound group of atoms that act as a unit but have a charge Ex: –OH - hydroxide –SO 4 2- sulfate –SO 3 2- sulfite Ex: sodium sulfate

Ionic Compound Practice-- name to formula NameFormula Iron (III) oxide Sodium chromate Calcium hydroxide

Ionic Compound Practice— formula to name Formula *If the metal is a transition metal, you will need to balance the charges to determine the Roman numeral. Name Na 2 SO 3 SnO 2 BeCl 2

Ionic Compounds Metal + Nonmetal –Metals tend to lose electrons to become positively charged (cations) –Nonmetals tend to gain electrons to become negatively charged (anions)

Example FK Dot Diagrams (show valence electrons)

FK + _ Ions

FK + _ The ionic bond is the attraction between the positive K + ion and the negative F - ion

KF Put the symbols together and you have the chemical formula

Naming Ionic Compounds For the first element, use the full element name –Potassium For the second element, change the ending to “- ide” –Fluoride KF Potassium Fluoride