Pearson Edexcel IAL Chemistry AS Topic 2: Atomic Structure & the Periodic Table Question Bank

Pearson Edexcel IAL Chemistry syllabusChemistry YCH11First assessment 2019

Practise atomic structure, isotope notation, mass spectra and ionisation energy data using tables, spectra and particle counts.

Exam points

interpret isotope notation to find protons, neutrons and electrons in atoms or ions
draw or read mass spectra, including molecular ion peaks for diatomic molecules
use successive ionisation energy tables to deduce an element and explain jumps

Which equation represents the second ionisation energy of chlorine?
□

A $\mathrm{Cl}^{-}(\mathrm{g})+\mathrm{e}^{-} \rightarrow \mathrm{Cl}^{2-}(\mathrm{g})$

□

B $\mathrm{Cl}(\mathrm{g})+2 \mathrm{e}^{-} \rightarrow \mathrm{Cl}^{2-}(\mathrm{g})$

□

C $\quad 2 \mathrm{Cl}(\mathrm{g}) \rightarrow 2 \mathrm{Cl}^{+}(\mathrm{g})+2 \mathrm{e}^{-}$

□

D $\quad \mathrm{Cl}^{+}(\mathrm{g}) \rightarrow \mathrm{Cl}^{2+}(\mathrm{g})+\mathrm{e}^{-}$

[Maximum number: 2]

The diagram shows a mass spectrometer.

(a)

Which process occurs in region R ?

the sample is vaporised using a heater

electrons are removed from molecules or atoms and positive ions are formed

electrons are added to the molecules or atoms and negative ions are formed

ions are accelerated by an electric field

[ 1 ]

(b)

Which statement is correct for region T ?

ions with a greater mass have a smaller deflection

ions with a greater mass have a greater deflection

ions with a greater charge have a smaller deflection

ions are speeded up by a magnetic field

[ 1 ]

[Maximum number: 1]

Which of these atoms has the most neutrons?

${ }_{49}^{115} \mathrm{In}$

${ }_{50}^{124} \mathrm{Sn}$

${ }_{51}^{123} \mathrm{Sb}$

${ }_{52}^{124} \mathrm{Te}$

[Maximum number: 1]

A p-block element in Period 3 of the Periodic Table reacts to form an ionic compound. What could be the electronic configuration of the ion formed by this element?

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{10}$

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{10} 4 s^{2} 4 p^{6}$

[Maximum number: 1]

The Period 2 element with the highest melting temperature is

aluminium

boron

carbon

silicon

[Maximum number: 14]

This question is about the element sulfur.

(a)

Complete the diagram to show the electronic configuration for a sulfur atom in the ground state.
Include labels for each subshell.

[ 2 ]

(b)

Write an equation for the first ionisation energy of sulfur. Include state symbols.

[ 2 ]

(c)

Explain why the first ionisation energy of sulfur is less than the first ionisation energies of both phosphorus and chlorine.
(3)

[ 3 ]

(d)

A sample of sulfur contains four isotopes.

[ 4 ]

(i)

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

[ 2 ]

(ii)

Calculate the relative atomic mass of sulfur in this sample.

Give your answer to two decimal places.
(2)

[ 2 ]

(e)

The mass spectrum of a sample of sulfur with ${ }^{32} \mathrm{~S}$ as the only isotope is shown.

[ 3 ]

(i)

Calculate the number of sulfur atoms in the molecular ion.

You must show your working.

[ 1 ]

(ii)

Suggest the formula of the most stable ion shown by this spectrum.
(2)

[ 2 ]

[Maximum number: 1]

The third ionisation energy of iron is $2958 \mathrm{~kJ} \mathrm{~mol}^{-1}$ .

Write the equation for the third ionisation energy of iron. Include state symbols.

Exam points

Question 2

Question 3

Question 3(a)

Question 3(b)

Question 5

Question 6

Question 7

Question 18

Question 18(a)

Question 18(b)

Question 18(c)

Question 18(d)

Question 18(d)(i)

Question 18(d)(ii)

Question 18(e)

Question 18(e)(i)

Question 18(e)(ii)

Question 21(b)(i)