Ionic and Covalent Reteach

Ionic and Covalent Reteach

3 types of Chemical Bonds

• Ionic - Form between a Metal and Nonmetal

• Covalent - Form between a Nonmetal and a Nonmetal

• Metallic - Form between a metal and a metal

Octet Rule

• Atoms are stable with 8 valence electrons, so they will bond to achieve stability

• You Need 8 to be GREAT

• Practice: What would the formula be for Magnesium bonding with Oxygen?

Using predicted charges to get the formula of a compound

• The positive and negative charges in ionic compounds CANCEL!

• This means you have to have the same + and - numbers!

• Practice: Bond Sodium with Se

Multiple Choice

How do the following two elements bond together?
Al³⁺  O^2-         

• AlO
• Al₂O₃
• Al₃O₆
• Al₃O₂

Multiple Choice

How do the following two elements bond together?
Cr³⁺  O^2-         

• CrO
• Cr₃O₂
• Cr₂O₃
• CrO₃

Multiple Choice

What would the formula be for Beryllium bonding with Fluorine?

• Be₂F

• BeF₂

• BeF

• BeF²

Naming Ionic Compounds

• Name metal first (DON'T CHANGE ANYTHING)

• Name the nonmetal second only CHANGE THE ENDING TO ide

• Example: Chlorine - Chloride

Multiple Choice

Which of the following is the correct formula for Potassium Chloride?

• KCl

• K¹Cl¹

• K₂Cl

• KCl₂

Multiple Choice

What is the correct formula for Aluminum Phosphide

• AlP

• Al₃P₃

• Al₃P₂

• AlP₃

Covalent Bonds

• Form between 2 nonmetals

• Electrons are shared

• Naming compounds held together by covalent bonds are different than ionic.

Rules for naming Covalent Molecules

• Need PREFIXES

• Prefixes are words in front of the element name

• They tell you how many of each atom you in the compound

• Still change the ending to ide

Prefixes :

Mono

Di

Tri

• Tetra

• Penta

• Hexa

• Hepta

• Octa

• Nona

• Deca

Example

• CO₂ - Carbon Dioxide

• CO - Carbon Monoxide

• N₂O₅ - Dinitrogen Pentoxide

REVIEW TIME!!!

Multiple Choice

What is the formula for sulfur pentoxide?

• SO₂
• SO₃
• SO₄
• SO₅

Multiple Choice

What is the formula for Lithium Iodide?

• LiI
• LiI₂
• LiI₃
• LiI₄

Multiple Choice

What is the name for CO?

• Copper Oxide
• Carbon monoxide
• monocarbon oxide
• Copper monoxide

Multiple Choice

What is the formula for Sodium Bromide? 

• NaBr
• NaBr₂
• Na₂Br
• Na₃Br

Multiple Choice

What is the name of NF₃?

• mononitrogen trifluoride
• nitrogen trifluoride
• nitrogen flouride
• nitrogen fluorine 

Multiple Choice

How do covalent bonds form?

• By donating and receiving valence electrons between atoms.

• Scientists still aren't sure.

• Opposite slight charges attract each atom in the compound.

• Sharing valence electrons between atoms

Multiple Choice

How do covalent bonds form?

• By donating and receiving valence electrons between atoms.

• Scientists still aren't sure.

• Opposite slight charges attract each atom in the compound.

• Sharing valence electrons between atoms