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CAIE A-Level Chemistry AS 9.1.2 Variation in Melting Point and Electrical Questions

Practise explaining Period 3 melting-point and electrical-conductivity trends from sodium to chlorine using structure, bonding and electron models.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Explain the variation in Period 3 melting points and electrical conductivity in terms of structure, bonding and delocalised electrons.

CAIE A-Level Chemistry AS 9.1.2 Variation in Melting Point and Electrical Questions question 1

[Maximum number: 1]

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

Table for Question CAIE A-Level Chemistry AS 9.1.2 Variation in Melting Point and Electrical Questions question 1 — 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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