Ions and Formula Units
Grade 12 Chemistry worksheet on understanding ions, their charges, and how to write chemical formulas for ionic compounds.
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Ions and Formula Units
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Read each question carefully and provide detailed answers. Show all your work for calculations.
1. An atom that has gained or lost electrons is called an .
2. A positively charged ion is known as a , while a negatively charged ion is called an .
3. The smallest whole number ratio of ions in an ionic compound is represented by its .
1. Which of the following elements is most likely to form a cation with a +2 charge?
Fluorine (F)
Oxygen (O)
Calcium (Ca)
Aluminum (Al)
2. What is the correct formula unit for the ionic compound formed between Potassium (K) and Sulfur (S)?
KS
K2S
KS2
K2S3
1. Explain the difference between an atom and an ion. Provide an example for each.
2. Describe the process of how ionic bonds are formed, including the role of valence electrons.
Write the chemical formula for the ionic compounds formed from the following ions:
1. Mg²⁺ and Cl⁻
2. Al³⁺ and O²⁻
3. Na⁺ and SO₄²⁻
4. NH₄⁺ and PO₄³⁻
1. Ionic compounds are generally good conductors of electricity in their solid state.
True
False
2. Polyatomic ions are formed by a single atom.
True
False
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