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CAIE A-Level Chemistry AS 9 The Periodic Table Chemical Periodicity Questions

Practise interpreting Period 3 trends in physical properties and explaining them through structure and bonding.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Covered syllabus points

9.1 Periodicity of physical properties of the elements in Period 39.2 Periodicity of chemical properties of the elements in Period 39.3 Chemical periodicity of other elements

Question 1

[Maximum number: 1]

Which statement is correct?

A

The atomic radius of silicon is larger than that of aluminium.

B

The boiling point of chlorine is higher than that of silicon.

C

The first ionisation energy of sulfur is greater than that of phosphorus.

D

The electrical conductivity of magnesium is greater than that of sodium.

Question 2

[Maximum number: 1]

Aluminium, silicon and phosphorus are elements in Period 3 of the Periodic Table. Each element forms an oxide.

Which row is correct?

Al2O3\mathrm{Al}_{2} \mathrm{O}_{3}

SiO2\mathrm{SiO}_{2}

P4O10\mathrm{P}_{4} \mathrm{O}_{10}

basic

amphoteric

acidic

giant ionic

giant ionic

simple molecular

high melting point

high melting point

low melting point

vigorous reaction with water

slight reaction with water

vigorous reaction with water

Question 3

[Maximum number: 1]

Which row shows the expected properties of the element astatine when compared to the properties of the element iodine?

electronegativity of astatine compared to iodine

volatility of astatine compared to iodine

less electronegative

higher

more electronegative

higher

less electronegative

lower

more electronegative

lower

Question 4

[Maximum number: 1]

The melting points of the Period 3 elements sodium to aluminium are shown in the table.

Table for Question 4 — CAIE A-Level Chemistry AS

Which factor explains the increase in melting points from sodium to aluminium?

A

the change in first ionisation energy from sodium to aluminium

B

the increase in electronegativity from sodium to aluminium

C

the increase in the ArA_{r} of the elements from sodium to aluminium

D

the increase in the number of outer electrons in each atom from sodium to aluminium

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