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2.5 Types of substance

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Question 13

Table 1 displays experimental data on the physical properties of three different crystalline solids, D, E, and F.

Table 1

Substance	Melting point ( $∘C^\circ\text{C}$ )	Electrical conductivity as a solid	Electrical conductivity when liquid / molten
D	1414	Poor	Poor
E	714	Poor	Good
F	98	Good	Good

Deduce, using the information in Table 1, the structure and bonding of substances D, E and F. Explain the properties of each substance in terms of its structure and bonding.

[6]

Markscheme

2.5 Types of substance Questions

GCSE
Chemistry
2.5 Types of substance

59 exam-style questions on Edexcel GCSE Chemistry 2.5 Types of substance, covering 2.5.1 Classifying substances by structure and bonding, 2.5.2 Properties of ionic and simple molecular substances, 2.5.3 Giant covalent structures: diamond and graphite, 2.5.4 Fullerenes, graphene and simple polymers, 2.5.5 Properties of metals and non-metals, and 2.5.6 Limitations of bonding models and representations. Each one has a worked solution and a mark scheme showing where the marks go.

2.5 Types of substance

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2.5 Types of substance

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Question 13

Table 1 displays experimental data on the physical properties of three different crystalline solids, D, E, and F.

Table 1

Substance	Melting point ( $∘C^\circ\text{C}$ )	Electrical conductivity as a solid	Electrical conductivity when liquid / molten
D	1414	Poor	Poor
E	714	Poor	Good
F	98	Good	Good

Deduce, using the information in Table 1, the structure and bonding of substances D, E and F. Explain the properties of each substance in terms of its structure and bonding.

[6]

Markscheme

2.5 Types of substance Questions

GCSE
Chemistry
2.5 Types of substance