CAIE A-Level Chemistry 4.2 Bonding and Structure

Practise identifying lattice type and using particles, bonding and mobility to explain physical properties.

Exam points

classify a solid as giant ionic, simple molecular, giant molecular or giant metallic
link melting or boiling point to the attractions or bonds overcome rather than merely naming the structure
explain conductivity and solubility through mobile charged particles and interactions with the solvent

Covered syllabus points

4.2.1—Describe, in simple terms, the lattice 4.2.2—Describe, interpret and predict the effect 4.2.3—The type of structure and bonding present

[Maximum number: 3]

Nitrogen and phosphorus are elements in Group 15 of the Periodic Table.

(a)

Complete Table 3.1 to show the properties of nitrogen and phosphorus in their standard states.

Table 3.1

[ 2 ]

(b)

A form of solid nitrogen has a lattice structure similar to solid iodine.

Identify the type of lattice structure of solid nitrogen.

[ 1 ]

[Maximum number: 2]

Bismuth is an element in Group 15 of the Periodic Table.

Bismuth reduces water to form bismuth oxide, $\mathrm{Bi}_{2} \mathrm{O}_{3}$ . A colourless gas that ignites with a squeaky pop also forms.

$\mathrm{Bi}_{2} \mathrm{O}_{3}$ is a yellow insoluble solid that melts at 1090 K . The molten compound conducts electricity.

Deduce the structure and bonding of $\mathrm{Bi}_{2} \mathrm{O}_{3}$ . Explain your answer.

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Covered syllabus points

4.2 Bonding and structure question 1

Question (a)

Question (b)

4.2 Bonding and structure question 2