Warm Up: 4 Minutes Write the Learning Target You should be working SILENTLY Stay in your own seat 1.Log into your computer 2.Go to m.socrative.com 3.Enter room number: Finish all questions When you are finished, check your grades on PS Connect DO NOT MOVE THE COMPUTERS Hint: Periodic Table and your naming sheet

Directions Go to Nearpod.com Click JOIN SESSION I will give you the code as soon as everyone is ready

Agenda Warm Up- 7 Minutes Cornell Style Notes & Examples- 15 Minutes Guided Practice-11 Minutes Independent Practice- 17 Minutes Closing – 3 Minutes

Goal For Today Calcium Chloride CaCl 2 Student Given:Student Answer:

Chemical Formula must include: 1. Correct Symbol for Element or Polyatomic Ion 2. Correct Subscript CaCl 2 Exception: If there is one of an element, then a subscript is not needed.

HOW TO WRITE CHEMICAL FORMULAS FOR IONIC COMPOUNDS? Step 1 Write the symbol and oxidation number (charge) for the cation [ oxidation number to be written as a superscript ] Ca +2 Example Calcium Chloride

HOW TO WRITE CHEMICAL FORMULAS FOR IONIC COMPOUNDS? Step 2 Write the symbol and oxidation number (charge) for the anion [ oxidation number to be written as a superscript ] Cl -1 Example Calcium Chloride

HOW TO WRITE CHEMICAL FORMULAS FOR IONIC COMPOUNDS? Step 3 Use the criss-cross rule to write formula with the correct subscripts. Ca +2 Cl -1 ExampleCalcium Chloride CaCl 2

How to check your answer? CaCl 2

Example 1: Rubidium Sulfate

Example 2: Chromium (III) Oxide

Example 3: Magnesium Hydroxide

Example 4: Strontium Phosphate

Guided Practice Teacher: 1. Will show the problem on the board Students: 1. Take 16 seconds to write the components on paper, identifying oxidation numbers. 2. Take 33 seconds to speak with your shoulder partner to compose the formula for the compound 3. Be ready to share the name of the compound when Mr. Ghosh says SWAG

We Do Beryllium Selenide BeSe

We Do Copper (II) Nitrate Cu(NO 3 ) 2

We Do Silver(I) Phosphide Ag 3 P

We Do Potassium Sulfate K 2 SO 4

Practice Makes Perfect By completing this worksheet INDEPENDENTLY, it will help us to perfect the skill of writing chemical formulas of ionic compounds. 85%

Answer Key CaBr 2 FeO KI CoNO 3 Fe 2 S 3 CuCl 2 Rb 2 S BaSO 4 KMnO 4 Ni(NO 3 ) 2 V 3 (PO 4 ) 2 Mn 2 (Cr 2 O 7 ) 5 Al(SO 3 ) 3 PbS 2 HgF RaS Be 3 N 2 CsCl Os(HCO 3 ) 3 LiOH

Closing What is the process for composing the chemical formula of an ionic compound? Tomorrow we will talk about composing the chemical formulas of covalent compounds

Warm Up: 4 Minutes Stay in your own seat 1.Log into your computer 2.Go to m.socrative.com 3.Enter room number: Finish all questions When you are finished, check your grades on PS Connect DO NOT MOVE THE COMPUTERS Hint: What rule do we use for ionic compounds?

Warm Up: 4 Minutes Chemical NameChemical Formula Magnesium Bromide MgBr 2 Chromium(II) Sulfite CrSO 3 Sodium Hydroxide NaOH Trioxygen Disulfide ?????? Hint: Periodic Table Write the Learning Target You should be working SILENTLY Stay in your own seat

Directions Go to Nearpod.com Click JOIN SESSION I will give you the code as soon as everyone is ready Your PIN:

Agenda Warm Up- 7 Minutes Cornell Style Notes & Examples- 13 Minutes Guided Practice- 10 Minutes Independent Practice- 12 Minutes Closing – 3 Minutes

HOW TO WRITE THE CHEMICAL FORMULA OF A COVALENT COMPOUND? Step 1 Make sure the name uses prefixes to ensure the compound is covalent. ExampleTrioxygen Disulfide

Step 2 Write the correct chemical symbol of the first element O ExampleTrioxygen Disulfide HOW TO WRITE THE CHEMICAL FORMULA OF A COVALENT COMPOUND?

Step 3 Write the correct chemical symbol of the second element S ExampleTrioxygen Disulfide HOW TO WRITE THE CHEMICAL FORMULA OF A COVALENT COMPOUND?

Step 4 Use prefixes to write the correct subscripts O3S2O3S2 ExampleTrioxygen Disulfide HOW TO WRITE THE CHEMICAL FORMULA OF A COVALENT COMPOUND?

Example 1 Disulfur Hexafluoride

Example 2 Triphosphorus Tetroxide

Example 3 Sulfur Hexabromide

Guided Practice Teacher: 1. Will show the problem on the board Students: 1. Take 16 seconds to write the components on paper 2. Take 33 seconds to speak with your shoulder partner to compose the formula for the compound 3. Be ready to share the name of the compound when Mr. Ghosh says SWAG

Dinitrogen Tetrahydride We Do

Trisulfur Octabromide We Do

Sulfur Dibromide We Do

Cobalt (II) Chloride We Do

Practice Makes Perfect By completing this worksheet INDEPENDENTLY, it will help us to perfect the skill of writing chemical formulas of covalent compounds. 85%

Answer Key LiBr S 3 P 4 KNO 3 OCl FeI 3 CuCl SF 6 Ba(MnO 4 ) 2 Ga 2 (Cr 2 O 7 ) 3 CBr 2 V 2 (CO 3 ) 3 Br 2 F 9 C 7 N 10 Na 2 O NO Mn 2 (Cr 2 O 7 ) 5 XeF 2 SO 2 Ir(HCO 3 ) 7 AsC 8

Closing What is the process for composing the chemical formula of an covalent compound? How is this different from the formula of an ionic compound?