Cambridge IGCSE Chemistry practice

Paper 3 structured question: Ions and ionic bonds

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Paper

Marks

Topic

Ions and ionic bonds

Exam-style question

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Paper 3Theory (Core)1 marks

Ionic bonding between sodium and chlorine is being studied.

Description

Sodium (Na) is in Group I and chlorine (Cl) is in Group VII. Sodium loses one electron to form Na+, and chlorine gains one electron to form Cl-.

a
State the charge of the sodium ion formed during this process.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 3Theory (Core)2 marks

Diagram Description

Draw a dot-and-cross diagram to show the formation of lithium fluoride (LiF).

a
Describe the electron transfer that occurs when lithium reacts with fluorine.
Your answer
Aim for approximately 2 distinct marking points.
[2]