31/10: Formula of ionic compounds

• Chemistry
• Secondary Education

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CHEMISTRY 9

19. Formulae of ionic compounds 

Week 12

W E L C O M E !       Today is the 31st of October, 2024.

• Where will you put your learning materials: notebook, coursebook, pen and pencil, and fully-charged laptop?
  
• Have you kept your phone in your locker?
• Have you gone to the bathroom before the class starts?
• Have you checked any announcements or missing work on our Google Classroom?
• Are you seated in your assigned chair?

• write the formula for an ionic compound based on the charges of the ions.

• write the name of an ionic compound.

Read-Pair-Answer

• Start on page 1 of your learning module.
• Read the text titled Chemistry in my daily life.
• Pair up with your seatmate(s).
• Answer the given questions.

What is the chemical name
of table salt?

1. sodium
2. sodium chlorine
3. sodium chloride
4. chlorine

What ion in sodium chloride helps our body function?

1. sodium
2. sodium chloride
3. chlorine
4. chloride

How much sodium our body needs each?

1. 50 g
2. 500 mg
3. 5000 g
4. 5 kg

If we consume too much salt, what is its effect on our body?

1. low blood sugar
2. high blood pressure
3. high blood sugar
4. diabetes

Write one other use of sodium chloride or table salt from your reading.

Charges in ions

Guided Practice

• Continue on page 4 of your learning module.
• Study the sample Lithium information.
• Do the same for all elements of Groups I to VII.
• If you have any questions, please raise your hand.

Charges in ions

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CHEMISTRY 9

19. Formulae of ionic compounds 

Week 12

Symbol

Ion charge

X-cross

Writing the formulae of ionic compounds

Cross-over Method

Writing the formulae of ionic compounds

Cross-over Method

Writing the formulae of ionic compounds

magnesium

bromine

Cross-over Method

Writing the formulae of ionic compounds

magnesium

bromine

SIX

Symbol

Ion charge

X - cross

Writing the formulae of ionic compounds

Cross-over Method

Writing the formulae of ionic compounds

Cross-over Method

Writing the formulae of ionic compounds

calcium

oxygen

Cross-over Method

Writing the formulae of ionic compounds

calcium

oxygen

SIX

Symbol

Ion charge

X - cross

Pres_Template

CHEMISTRY 9

19. Formulae of ionic compounds 

Week 12

• write the formula for an ionic compound based on the charges of the ions.

• write the name of an ionic compound.

Guided Practice

• Continue on page 5 of your learning module.
• Study the sample found in the table.
• Use the 6 "SIX" strategy to write the formula.
• If you have any questions, please raise your hand.

Writing the formulae of ionic compounds

Writing the formulae of ionic compounds

Pres_Template

CHEMISTRY 9

19. Formulae of ionic compounds 

Week 12

Writing the name of ionic compounds

Metal + Non-metal-ide

Guided Practice

• Continue on page 6 of your learning module.
• Study the first table.
• Complete the second table.
• Use the strategy: Metal + Non-metal-ide
• If you have any questions, please raise your hand.

Share your thought process.

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CHEMISTRY 9

19. Formulae of ionic compounds 

Week 12

I can write the formula for an ionic compound based on the charges of the ions.

Yes, I can confidently do it.

Yes, I can but need more practice.

No, I lack confidence so I need more practice or ask help from my teacher.

I can write the name of an ionic compound.

Yes, I can confidently do it.

Yes, I can but need more practice.

No, I lack confidence so I need more practice or ask help from my teacher.

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STEM Project

Building a Futuristic City Scale Model

Week 11