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Ion Formation Worksheet
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Ion Formation Worksheet
⚛️ Part 1: Understanding Ions
1. What is an ion?
An atom with the same number of protons and electrons
An atom that has gained or lost electrons
A neutral particle
A type of molecule
2. A cation is:
A positively charged ion
A negatively charged ion
A neutral atom
An electron
3. An anion is formed when an atom:
Loses electrons
Gains electrons
Loses protons
Gains protons
4. Fill in the blanks:
When a sodium atom (Group 1) forms an ion, it ________ one electron to become a ________ charged ion with a charge of ________.
🔬 Part 2: Predicting Ion Charges
5. Complete the table by predicting the ion charge for each element:
Element: Magnesium (Group 2) → Ion charge: _______
Element: Chlorine (Group 7) → Ion charge: _______
Element: Oxygen (Group 6) → Ion charge: _______
Element: Potassium (Group 1) → Ion charge: _______
6. Explain why Group 1 metals always form +1 ions:
7. Explain why Group 7 non-metals always form -1 ions:
✏️ Part 3: Ion Formation Practice
8. Draw a simple diagram showing how a lithium atom becomes a lithium ion. Show the electrons before and after:
9. Which of these statements about ion formation are correct? (Tick all that apply)
Metals tend to lose electrons
Non-metals tend to gain electrons
The number of protons changes when ions form
Ions have different charges than their original atoms
10. Give one everyday example of where ions are important and explain why:
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