Page 14 - ACE YR IGCSE A TOP APPROACH TO CHEM

2 Atoms, Elements and Compounds

Part 1: Multiple-choice Questions
Answer all questions. For each question, there are four possible answers. Choose the best and correct answer.

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1 The diagram shows an atom of an element. C this is a stable arrangement of electrons.
D the nucleon number is 23.

4 Which statement is not true about nucleon
number?
9p
9n A It is also known as mass number.
Key:
p = protons B It is the number of neutrons.
n = neutrons C It is the total number of protons and
neutrons.
How many valence electrons does an ion D It is the total number of subatomic
of this element have? particles in the nucleus.
A 7 C 9
B 8 D 10 5 The diagram shows the outline of the
Periodic Table.
2 Which statement below is correct about
subatomic particles?
A Protons are negatively charged.
B Electrons have a mass of 1.
C Protons and neutrons are in the
nucleus.
D Electrons and protons are in the The following statements are correct
nucleus. about the Periodic Table, EXCEPT
A the zigzag line divides between metals
Clone Oct / Nov 2014 and non-metals.
3 The electronic structure shows it is an B the first vertical column is known as
atom. Group I.
C the third horizontal row is known as
Period 3.
D the elements are arranged in order of
increasing electron number.
11p
12n 6 The diagram shows the electronic structure
Key: of an atom.
p = protons
n = neutrons
The following statements are true about the
atom, EXCEPT
A has the same number of electrons and
protons.
B there is no overall charge.

Chapter 2 Atoms, Elements and Compounds 11

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