Writing Chemical Formulas for Ionic Compounds
A Grade 11 chemistry worksheet on writing chemical formulas for ionic compounds, including identifying charges, balancing ions, and naming conventions.
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Writing Chemical Formulas for Ionic Compounds
Name:
Date:
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Read each question carefully and follow the instructions to write the correct chemical formulas for ionic compounds. Remember to balance charges to ensure a neutral compound.
Observe the illustration below showing the formation of an ionic bond.
1. Ionic compounds are formed between a and a .
2. In an ionic bond, electrons are from one atom to another.
3. The overall charge of an ionic compound must always be .
Write the chemical formula for the ionic compound formed from the following ions:
4. Sodium ion (Na⁺) and Chloride ion (Cl⁻)
5. Magnesium ion (Mg²⁺) and Oxide ion (O²⁻)
6. Aluminum ion (Al³⁺) and Fluoride ion (F⁻)
7. Calcium ion (Ca²⁺) and Phosphate ion (PO₄³⁻)
8. Which of the following is the correct chemical formula for potassium sulfide?
KS
K₂S
KS₂
K₂S₂
9. What is the charge of the iron ion in the compound Fe₂(SO₄)₃?
+1
+2
+3
+6
10. Transition metals always have a fixed charge when forming ionic compounds.
True
False
Write the name for each of the following ionic compounds:
11. Al₂O₃
12. Fe(NO₃)₂
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