MEDIUM
AS and A Level
IMPORTANT
Earn 100

The sketch graph shows the 13 successive ionization energies of aluminium.
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Explain how the graph provides evidence for the existence of three electrons shells in an aluminium atom.

Important Questions on Electrons in Atoms

MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>EXAM-STYLE QUESTIONS>Q 1
Write an equation, including state symbols, to represent the 2nd ionization energy aluminium.
HARD
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>EXAM-STYLE QUESTIONS>Q 1
Write the electronic configuration of an aluminium ionAl+3, using 1s2notation.
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>EXAM-STYLE QUESTIONS>Q 2
The table shows the first ionization energies,IE1,in KJmol-1, of the elements in the period 3 of the periodic table.
Element Na Mg Al Si P S Cl Ar
IE1 494 736 577 786 1060 1000 1260 1520

Explain why there is a general increase in the value of IE1 across the period.

MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>EXAM-STYLE QUESTIONS>Q 2
The table shows the first ionization energies,IE1,in KJmol-1, of the elements in the period 3 of the periodic table.
Element Na Mg Al Si P S Cl Ar
IE1 494 736 577 786 1060 1000 1260 1520

Write the electronic configuration for argon (Z=18) using 1s2 notation.

MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>EXAM-STYLE QUESTIONS>Q 2
Copy and complete the diagram below for the 15 electrons in phosphorus by:
Adding labels for the other sub-shell.
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MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>EXAM-STYLE QUESTIONS>Q 2
Copy and complete the diagram below for the 15 electrons in phosphorus by:
Showing how the electrons are arranged.
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MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>EXAM-STYLE QUESTIONS>Q 2
Predict a value for the first ionization energy for potassium, which has one more proton than argon.
EASY
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>EXAM-STYLE QUESTIONS>Q 3
Draw diagrams to show the shape of p-orbital.