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Edexcel IGCSE Chemistry (c) Atomic structure Question Bank

Practise interpreting atomic structure, isotope data and formulae to link particles, atomic numbers and relative atomic mass.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Exam points

  • label protons, neutrons and electrons on atomic diagrams and use relative charge data
  • define isotopes by same proton number and different neutron number in named atoms
  • calculate relative atomic mass from isotope masses and percentage abundances

Covered syllabus points

1.14 Atoms and molecules1.15 Atomic structure1.16 Atomic number and isotopes1.17 Relative atomic mass

(c) Atomic structure question 1

[Maximum number: 1]

This question is about elements, compounds and mixtures.

The box gives the names of some substances.

Table for Question (c) Atomic structure question 1 — Edexcel IGCSE Chemistry

Choose a substance from the box to answer each of these questions.

Give the name of a diatomic molecule.

(c) Atomic structure question 2

[Maximum number: 9]

Question (a)

(a)

Table 1 gives some information about three subatomic particles.

[ 4 ]

Question (i)

(i)

Complete Table 1 by giving the missing information.

Table 1

Table 1

[ 3 ]

Question (ii)

(ii)

Give the name of the part of the atom containing protons and neutrons.

[ 1 ]

Question (b)

(b)

Table 2 shows the numbers of protons, neutrons and electrons in the species U, V, W, X, Y and Z.

Table 2

Table 2

[ 2 ]

Question (i)

(i)

Give the mass number of Z.

[ 1 ]

Question (ii)

(ii)

Give the letters of the two species that are isotopes of the same element.

[ 1 ]

Question (c)

(c)

A sample of neon contains two isotopes, 20Ne{ }^{20} \mathrm{Ne} and 22Ne{ }^{22} \mathrm{Ne}

The relative abundances of the two isotopes in the sample are

20Ne91.2%22Ne8.80%{ }^{20} \mathrm{Ne} 91.2 \% \quad{ }^{22} \mathrm{Ne} 8.80 \%

Calculate the relative atomic mass of this sample of neon.
Give your answer to one decimal place.

[ 3 ]

(c) Atomic structure question 3

[Maximum number: 5]

This question is about Group 2 elements and their compounds.

Question (a)

(a)

A sample of magnesium contains three isotopes.

Table for Question (a) — Edexcel IGCSE Chemistry
[ 5 ]

Question (i)

(i)

State, in terms of subatomic particles, what is meant by the term isotopes.

[ 2 ]

Question (ii)

(ii)

Calculate the relative atomic mass (Ar)\left(A_{r}\right) of magnesium.

Give your answer to one decimal place.

Ar=A_{r}=
[ 3 ]
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