11 mark
Which equation represents the second ionisation energy of chlorine?
Cl− (g) + e−→ Cl2− (g)
Cl (g) + 2e− → Cl2− (g)
2Cl (g) → 2Cl+ (g) + 2e−
Cl+ (g) → Cl2+ (g) + e−
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1.4 Electrons & Ions
21 mark
Which equation represents the second ionisation energy of magnesium?
Mg (g) → Mg2+ (g) + 2e−
Mg+ (g) → Mg2+ (g) + e−
Mg (s) → Mg2+ (s) + 2e−
Mg+ (s) → Mg2+ (s) + e−
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31 mark
Several factors may affect ionisation energies:
I) the number of protons increases
II) the outer electron is further from the nucleus
III) the amount of shielding increases
IV) the number of unpaired outer electrons increases
Which factors explain the decrease in ionisation energy as Group 1 is descended?
I and II
II and III
III and IV
I, II, III and IV
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11 mark
The graph shows log (ionisation energy) against ionisation number for the successive ionisations of an element.
In this element, how many quantum shells contain electrons, and how many electrons are in the outer quantum shell?
| Number of quantum shells containing electrons |
Number of electrons in the outer quantum shell |
|||
| ☐ | A | 3 | 2 | |
| ☐ | B | 3 | 5 | |
| ☐ | C | 5 | 2 | |
| ☐ | D | 5 | 5 |
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21 mark
A stable ion, M3+, contains 18 electrons.
In which block of the Periodic Table is element M found?
s
p
d
f
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31 mark
Which ion has the electronic configuration 1s22s22p63s23p6 in its ground state?
Al3+
Cl−
N3−
Na+
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4
1 mark
1 markA 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?
1s22s22p63s2
1s22s22p63s23p6
1s22s22p63s23p63d10
1s22s22p63s23p63d104s24p6
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