Page 16 - ACE YR IGCSE A TOP APPROACH TO CHEM

Part 2: Structured Questions

Answer all questions.

1 The diagrams show the electronic structures of elements V, W, X, Y and Z.

Key
p = protons
n = neutrons
20p
20n
6p 8p 6p
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8n 8n 6n 1p

V W X Y Z

(a) Which atom is a metal?

[1]

(b) Write the electronic configuration of atom V.

[1]

(c) Y and Z combine to form a compound.
What type of bond will they form?

[1]

(d) V and X can react to form an ionic lattice.

(i) What is ionic lattice?

[2]

(ii) Based on the electronic structure, what is the chemical formula of V and X when
they form an ionic compound?

[1]

(iii) Draw the electronic structures of the two ions, V and X present in the ionic compound.
Use dot-and-cross diagrams to show electron arrangements. Show only the outer
shell electrons. Include the charges on the ions.

[3]

Chapter 2 Atoms, Elements and Compounds 13

Chapter 2.indd 13 3/4/22 11:59 AM