Download Ionization/Ionisation Energy Worksheet: First, Second, Third Ionization Energies and more Exercises Chemistry in PDF only on Docsity! 1. The sketch graph shows the 13 successive ionisation energies of aluminium.
anero
aor
The table below shows the 1st ionisation energies, AH.
log), ionisation energy
9
Oo 17 3 4 5 6 7 8 9 1011 12 13
Number of electrons removed
Define the term Ist ionisation energy.
How does the graph provide evidence forthe existence of three electron shells in an aluminium atom?
Write an equation, including state symbols, to represent the 2nd ionisation energy of aluminium.
Write the electronic configuration of an aluminium ion, Al, using 1s? notation.
inkJmol™, of the elements in Period 3 of the Periodic Table.
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Na Mg AL Si P 5 cl Ar
494 | 736 | S77 | 786 | 1060 | 1000 | 1260 | 1520
Explain why there is a general increase in the value of AH, across the period.
Explain why aluminium has a lower value of AH, than magnesium.
Write the electronic configuration for argon (Z= 18) using 1s* notation.
Copy and complete the diagram below forthe 15 electrons in phosphorus by
i adding labels forthe other subshells
fi showing how the electrons are arranged.
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Predict a value for the 1stionisation energy for potassium, which has one more proton than argon.
What do you understand by the term atomic orbital?
Draw diagrams te show the shape of:
i ansorbital
ii ap orbital.
Element X has the electronic configuration 1572s" 2p°3s*43p*3d®4s7_
i Which blockin the Periodic Table does element X belong to?
ii State the maximum numberof electrons inad subshell.
iii, Element X forms anion of type x7".
Write the full electronic configuration for this ion using 1s? notation.
iv Write the symbol for the subshell that begins to fill after the 3d and 4s are completely full.
4° The Lst ionisation energies of several elements with consecutive atomic numbers are shown in the graph below.
The letters are not the symbols of the elements.
2000
1600
1200
Firstionieation energy / kimk!
ABCODOEFGHI I
Element
Which of the elements A to | belong to Group 1 in the Periodic Table? Explain your answer.
Which of the elements A to I could have the electronic configuration 1725? 2p®3s*7
Explain the risein 1stionisation energy between element E and element.
Estimate the 1st ionisation energy of element J.
The successive ionisation energies of element A.are shown in the sketch graph.
eanga
hag, tanisaan energy
o 1 2 3 4 5 6 7 5 a
Number of electrons removed
What information does this graph give about how the electrons are arranged in shells for element A?
5 a Define the following:
i Aistionisation energy
ii 3rd ionisation energy.
b Give the equations representing:
i the Istionisation energy of magnesium
ii the 3rd ionisation energy of magnesium.
c Which ionisation energies are represented by the equations below?
i Mg™(g) —> Mg*ig} +e
ii Al*{g} —> Alig} +e
