The newest 6 of 6 written questions. Open one to see it on the real paper.
Which two elements react together to form an ionic compound?
See it on the paper →Select three properties from the list that are properties of a solid ionic compound. Place ticks (3) in the three boxes next to the correct properties. generally soluble in water good electrical conductivity low melting point high melting point
See it on the paper →Select three properties from the list that are properties of a solid ionic compound. Place ticks (3) in the three boxes next to the correct properties. generally soluble in water good electrical conductivity low melting point high melting point
See it on the paper →Explain why molten sodium oxide conducts electricity, but solid sodium oxide does not conduct electricity.
See it on the paper →Tick (✓) the correct property of ionic compounds. generally insoluble in water good electrical conductivity when solid
See it on the paper →Explain why magnesium oxide has a high melting point.
See it on the paper →The correct property of ionic compounds was generally identified.
— Examiner report, February/March 2025, 0654/42 Q5(c)(ii) (Cambridge)
Candidates were required to link the high melting point of magnesium oxide to the strong attraction between oppositely charged ions found in ionic bonding and the large amount of energy required to overcome this attraction. When an answer was given many did not use the correct terminology, often referring to just ‘a strong bond’.
— Examiner report, October/November 2022, 0654/43 Q5(c)(iii) (Cambridge)
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