MEDIUM
AS and A Level
IMPORTANT
Earn 100
i) Write an equation for the reaction of magnesium with cold water.
ii) Predict and explain the of the resulting solution.
Important Questions on Periodicity
MEDIUM
AS and A Level
IMPORTANT
Substance X does not conduct electricity when solid but conducts when molten. What type of bonding is present in this structure? Suggest two other physical properties of X, giving reasons for your answers.
MEDIUM
AS and A Level
IMPORTANT
Substance Y has a very high melting point and does not conduct electricity when molten. What type of structure is Y? Suggest one other physical property of Y, giving reasons for your answer.
MEDIUM
AS and A Level
IMPORTANT
Discuss how first ionisation energy changes across Period two and the reasons for this.
MEDIUM
AS and A Level
IMPORTANT
Describe how atomic radius and ionic radius changes across a period and down the group.
MEDIUM
AS and A Level
IMPORTANT
Describe and explain the change in oxidation numbers of the elements in the oxides belonging to Groups 1, 2 and 13 to 17. Also, describe and explain the variation in oxidation numbers of the chlorides in Groups 13 to 17.
EASY
AS and A Level
IMPORTANT
Explain the chemical term:
Brønsted—Lowry acid
EASY
AS and A Level
IMPORTANT
Explain the chemical term:
Brønsted—Lowry base
EASY
AS and A Level
IMPORTANT
Explain the chemical term:
electronegativity
