ConceptConceptDocsDocuments

CAIE A-Level Chemistry 9.1 Period 3 Physical Property Trends

Practise describing Period 3 trends in radii, melting point and conductivity and explaining structural discontinuities.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • describe atomic-radius and ionic-radius patterns across Period 3 from data or a plotted trend
  • relate metallic conductivity and melting point to ion charge, radius and delocalised electrons
  • explain the silicon-to-phosphorus melting-point fall by giant covalent versus simple molecular structure

Covered syllabus points

9.1.1—Period 3 physical property trends9.1.2—Variation in melting point and electrical

9.1 Periodicity of physical properties of the elements in Period 3 question 1

[Maximum number: 2]

Use the axes to sketch a graph that shows the trend in melting points of the elements with atomic numbers 11 to 17.

Figure for Question 9.1 Periodicity of physical properties of the elements in Period 3 question 1 — CAIE A-Level Chemistry AS

9.1 Periodicity of physical properties of the elements in Period 3 question 2

[Maximum number: 4]

The table gives some data for elements in the third period and some of their compounds.

Table for Question 9.1 Periodicity of physical properties of the elements in Period 3 question 2 — CAIE A-Level Chemistry AS

Question (a)

(a)

On the axes, sketch the trend in melting point of the elements Na to S .

Figure for Question (a) — CAIE A-Level Chemistry AS
[ 1 ]

Question (b)

(b)

Give three statements to explain your sketch.

1
2
3

[ 3 ]
All question bank results loaded