CAIE IGCSE Chemistry 2.4.1 Formation of Positive Ions Known As Questions
Use electron transfer and charge balance to explain ion formation, ionic formulae and bonding.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- explain how atoms form positive and negative ions
- determine ion charge from electron gain or loss
- write and interpret ionic formulae
- explain ionic bonds and properties of ionic compounds
CAIE IGCSE Chemistry 2.4.1 Formation of Positive Ions Known As Questions question 1
[Maximum number: 1]
Magnesium reacts with oxygen to form magnesium oxide.
What happens to magnesium atoms and oxygen atoms during this reaction?
A
Magnesium and oxygen share two electrons.
B
Magnesium gains two electrons and oxygen loses two electrons.
C
Magnesium loses one electron and oxygen gains one electron.
D
Magnesium loses two electrons and oxygen gains two electrons.
D
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