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GCSE U1 T3 Structure and Properties of Non-Metallic Substances

Total questions: 27

Worksheet time: 30mins

Name
Class
Date
1.

Name and describe the structure of most non-metallic substances.

a)
Most non-metallic substances have a network covalent structure.
b)
Most non-metallic substances have a metallic molecular structure.
c)
Most non-metallic substances have a covalent molecular structure.
d)
Most non-metallic substances have an ionic molecular structure.
2.

Are covalent bonds strong or weak?

a)

Strong

b)

Weak

3.

Property of molecular covalent substances resulting in alot of them being gases and liquids

(a)  

4.

Label the diagram

a)

Strong covalent bonds

b)

within molecules

c)

Weak Van der Waals

d)

between molecules

1
2
1)
2)
5.

Label the diagram

a)

Strong covalent bonds

b)

within molecules

c)

Weak

d)

Van der Waals between molecules

1
2
1)
2)
6.

What are the weak forces of attraction called that exist between molecules in molecular covalent substances

(a)  

7.

Why do molecular covalent substances have low melting and boiling points.​

a)

weak

b)

Van der Vaal's forces

c)

between molecules

d)

do not require a lot

e)

of energy to break

1)
2)
3)
4)
5)
8.

Explain why molecular covalent substances do not conduct electricity

a)

because they solid

b)

because they are not charged

c)

because they are mainly gases

d)

because there are no particles free to move and carry an electric current

9.

What is an allotrope

a)

different

b)

forms

c)

of the same element

d)

in the same

e)

physical state

1)
2)
3)
4)
5)
10.

What are the 3 allotropes of carbon in alphabetical order

(a)  

11.

Describe the structure of diamond

a)

giant covalent structure

b)

with each carbon

c)

covalently bonded

d)

to 4 others in a

e)

tetrahedral arrangement

1)
2)
3)
4)
5)
12.

2 properties of diamond

a)

Very high melting and boiling point

b)

Low melting and boiling point

c)

Does not conduct electricity

d)

Conducts electricity

13.

Which of the following properties are correct for Diamond

a)

Soft

b)

Rough

c)

Hard

d)

Very Hard

14.

Use of Diamond

(a)  

15.

2 giant covalent substances that conducts electricity as it has delocalised electrons that are free to move and carry charge. Hint: 2nd word is 'and', substances are in alphabetical order.

(a)  

16.

Label the diagram of graphite

a)

Covalent bond

b)

carbon atom

c)

Van der Waals

1
2
3
1)
2)
3)
17.

2 properties of graphite

a)

High melting point

b)
Low melting point
c)

Slippery solid

d)
Poor conductor of electricity
18.

Describe the structure of Graphene

a)

Giant covalent structure with

b)

each carbon covalently bonded to

c)

3 others creating layers and

d)

weak Van der Waal forces of

e)

attraction exist between the layer

1)
2)
3)
4)
5)
19.

Graphite is giant covalent structure made of carbon with ​ (a)   covalent bonds to 3 others within the ​ (b)   and ​ (c)   Van der Waal forces of attraction ​ ​ (d)  

Choose from the below words
strong
layers
weak
between the layer
20.

A use of graphite is ​ (a)   ​ (b)   ​ (c)   ​ (d)   ​ (e)  

Choose from the below words
lu
br
ic
an
t
21.

A use of graphite is

a)

pe

b)

nc

c)

il

d)

le

e)

ad

1)
2)
3)
4)
5)
22.

Properties of graphene

a)
Graphene has low mechanical strength and low surface area.
b)
Graphene has low electrical conductivity and poor thermal conductivity.
c)
Graphene is a three-dimensional material composed of multiple layers of carbon atoms.
d)

Graphene has high electrical conductivity, excellent thermal conductivity, exceptional mechanical strength and high surface area.

23.

Describe the structure of Graphene

a)

A single-atom thick layer

b)

of graphite

c)

with strong covalent bonds between each carbon atom. The

d)

atoms are arranged in

e)

hexagons / two dimensional.

1)
2)
3)
4)
5)
24.

Substance that is 100 times stronger than steel but is very thin, light and inexpensive.

(a)  

25.

Uses of graphene

a)

solar cells

b)

touch panels

c)

drill bits

d)

in pencils

26.

Match the following

a)

1.

Diamond

b)

2.

Graphite

c)

3.

Graphene

d)

4.

Methane

e)

5.

Ammonia

27.

Graphite and graphene conduct electricity due to ___________ _________ that are free to move and carry charge.

(a)  

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