The structure of the atom — Question Bank (Cambridge) — Cambridge IGCSE Physics 0625 Revision Notes & Topical Questions

Cambridge Lower Secondary Stage 8

Question 1
Paper Ref: 0620/23_Summer_2020_Q4

The structure of an atom of element X is shown.
key
@ = electron
n = neutron
p = proton
What is element X?
A boron
B carbon
C sodium
D sulfur

Options:
A
B
C
D
Correct Key: A

Question 2
Paper Ref: 0620/21_Summer_2015_Q3

Atoms contain electrons, neutrons and protons.
What is the definition of nucleon number?
oo BD
the number of neutrons in the nucleus of an atom
the number of protons in the nucleus of an atom
the total number of neutrons and protons in the nucleus of an atom
the total number of particles in an atom

Options:
A
B
C
D
Correct Key: C

Question 3
Paper Ref: 0620/11_Winter_2024_Q3

One atom of an element contains 12 electrons, 12 protons and 13 neutrons.
How many nucleons does this atom contain?
A 12 B 13 C 24 D 25

Options:
A
B
C
D
Correct Key: D

Question 4
Paper Ref: 0620/23_Winter_2025_Q3

Which statement defines nucleon number?
A
B
Cc
D
It is the total number of protons in the nucleus of an atom.
It is the total number of electrons surrounding the nucleus of an atom.
It is the total number of neutrons in the nucleus of an atom.
It is the total number of protons and neutrons in the nucleus of an atom.

Options:
A
B
C
D
Correct Key: D

Question 5
Paper Ref: 0620/12_Summer_2016_Q6

An atom of element Q contains 19 electrons, 19 protons and 20 neutrons.
What is Q?
A calcium
B potassium
C – strontium
D- yttrium

Options:
A
B
C
D
Correct Key: B

Question 6
Paper Ref: 0620/22_Winter_2010_Q9

The table shows the structure of different atoms and ions.
. proton nucleon number of | number of | number of
particle
number number protons neutrons electrons
Mg 12 24 12 Ww 12
Mg?" Xx 24 12 12 10
F 9 19 9 Y 9
F⁻ 9 19 9 10 Z
oo wD >
10
10
12
12
10
12
10
12

Options:
A
B
C
D
Correct Key: D

Question 7
Paper Ref: 0620/13_Winter_2023_Q3

The structure of an atom of element X is shown.
key
@ = electron
n = neutron
p = proton
What is element X?
boron
B carbon
C sodium
D — sulfur

Options:
A
B
C
D
Correct Key: A

Question 8
Paper Ref: 5129/12_Winter_2021_Q15

A nucleus is represented by the symbol 3) X.
What does this nucleus contain?
37 electrons and 44 neutrons
37 neutrons and 81 protons
37 protons and 44 neutrons
0 0O wD PY
37 protons and 81 neutrons

Options:
A
B
C
D
Correct Key: C

Question 9
Paper Ref: 5129/11_Winter_2024_Q15

Which statement about atoms is correct?
A Most of the mass of an atom is contained in the nucleus.
The neutrons are found in shells orbiting the nucleus.
The number of neutrons is called the nucleon number.
0 O WW
The outer shell always contains 8 protons.

Options:
A
B
C
D
Correct Key: A

Question 10
Paper Ref: 0620/13_Winter_2024_Q4

What is the nucleon number of an atom?
A the number of neutrons
B the number of protons
C the total number of protons and neutrons
D
the total number of protons and electrons

Options:
A
B
C
D
Correct Key: C

Question 11
Paper Ref: 5129/11_Summer_2023_Q15

What is the definition of nucleon number (mass number)?
A the mass in grams of an atom
B- the number of electrons in an atom
C the number of nuclei in a molecule
D
the total number of protons and neutrons in an atom

Options:
A
B
C
D
Correct Key: D

Question 12
Paper Ref: 0620/11_Summer_2022_Q7

What happens to an atom when it becomes an ion with a charge of +1?
It gains an electron.
B It gains a proton.
C_Itloses an electron.
D_ It loses a proton.

Options:
A
B
C
D
Correct Key: C

Question 13
Paper Ref: 0620/22_Summer_2022_Q22

Which statement about acids is correct?
A Acids are proton acceptors.
Acids transfer electrons to bases in aqueous solution.
Hydrochloric acid reacts with ammonium hydroxide to produce ammonia.
0 OO WW
Ethanoic acid partially ionises in aqueous solution.

Options:
A
B
C
D
Correct Key: D

Question 14
Paper Ref: 0620/13_Summer_2018_Q4

Symbols representing four particles are shown.
Mw gxe ly
The letters are not the chemical symbols.
Which particles have the same number of neutrons?
A Wand x** B Wandz Cc X* andy
37
72
D YandZ

Options:
A
B
C
D
Correct Key: B

Question 15
Paper Ref: 0620/21_Summer_2011_Q24

Which statement is correct for the element of proton number 19?
oo BD
It is a gas that dissolves in water.
It is a hard metal that is not very reactive with water.
It is a non-metal that burns quickly in air.
It is a soft metal that is highly reactive with water.

Options:
A
B
C
D
Correct Key: D

Question 16
Paper Ref: 5129/12_Winter_2022_Q16

A proton has a relative mass of 1 and a relative charge of +1.
What are the relative mass and relative charge of an electron?
— relative mass relative charge

Options:
A
B
C
D
Correct Key: A

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