Page 21 - ACE YR IGCSE A TOP APPROACH TO CHEM

(e) Brass is an alloy that is made of copper.

(i) What is alloy?

[1]
(ii) What is another metal used to make brass?

[1]
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(iii) Why is an alloy better than a pure metal for usage?

[1]
[Total: 11]

6 These are some elements in the Periodic Table.
23 S 24 T 27 U 28 V 31 W 32 X 35.5 Y 40 Z
11 12 13 14 15 16 17 18

(a) Choose from the elements above to answer the questions below. An element may be
selected once, more than once or not at all.

(i) Which two elements have the valency of 2?

[2]
(ii) Which element can react with bromine to form an ionic compound in the ratio of 1 : 1?

[1]

(iii) Which element can form 4 single bonds with halogens?

[1]

(iv) Which element forms M when it ionises?
3–

[1]

(v) Which element has the electronic configuration of 2,8,7?

[1]

(b) The elements above are all located in the third period of the Periodic Table.
Explain the statement.

[2]

Cambridge IGCSE TM
18 Ace Your Chemistry

Chapter 2.indd 18 3/4/22 11:59 AM