Page 17 - ACE YR IGCSE A TOP APPROACH TO CHEM

(e) In a complete combustion, some products are formed.
Which two atoms will join to form the product of combustion? Name the product.

[2]
(f) Which of the given elements are isotopes? Explain your answer.

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[3]

(g) The isotopes that will decay and give out radiation are called radioisotopes.
Radioisotopes are useful in industry and medicine.
Name a use of radioisotopes in

medicine :

industry :
[2]
[Total: 16]

2 Potassium chloride is an ionic compound.

(a) Write the chemical formula of potassium chloride.

[1]
(b) Describe what happens, in terms of electron loss and gain, when potassium atom reacts
with chlorine atom.

[2]

(c) Describe the structure of solid potassium chloride. You may draw a diagram.

[2]

Cambridge IGCSE TM
14 Ace Your Chemistry

Chapter 2.indd 14 3/4/22 11:59 AM