1. Periodicity – A-level Revision Session
Don’t worry – this isn’t being assessed!

2. Before we start…
Describe and explain the trend in atomic radius across a period.

3. Which has the highest 1st ionisation energy?
Sodium
Caesium
Lithium
Potassium
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4. Which has the highest 1st ionisation energy?
Sodium
Chlorine
Phosphorus
Magnesium
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5. What’s the oxidation state of Manganese in MnO4-?2 3 4 5 6 7
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6. What’s the oxidation state of Phosphorus in P4O6?2 3 4 5 6 7
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7. What’s the oxidation state of Xenon in XeO3F2?4 5 6 8 10 12
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8. What’s hybridisation of carbon in C2H4?sp
sp2
sp3
sp3d2
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9. What’s hybridisation of boron in BCl3?sp
sp2
sp3
sp3d2
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10. What is the valence shell electronic configuration in F?
1s2 2s2 2p4
2s2 2p5
1s2 2s2 2p5
1s2 2s2 2p6 3s2 3p5
3s2 3p5
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11. Which has the highest electronegativity?
Potassium
Nitrogen
Calcium
Boron
Carbon
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12. Which has the lowest electronegativity?
Potassium
Nitrogen
Calcium
Boron
Carbon
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13. Which bond would be the more polarised?
Cl-F
Br-Cl
I-F
Br-F
I-Br
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14. Which of these bonds have the correct polarities labelled?
A & C
B & C
A & D
B & D
C & D
A, B & C
A, B & D d+ d- d- d+ B A d+ d- d- d+ C D
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15. Which oxidation states are found in phosphorus compounds?
1, 3, 5
3, 5
3, 5, 6
1, 2, 3, 6
1, 2, 5, 6
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16. Which has the lowest thermal stability?
CaCO3
SrCO3
MgCO3
BaCO3
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17. What is the correct order in terms of lattice enthalpy?
KCl > MgCl2 > NaCl > MgO
NaCl > KCl > MgO > MgCl2
MgCl2 > MgO > KCl > NaCl
MgO > MgCl2 > NaCl > KCl
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18. Which of the following bonds would you expect to be the strongest?
Si-Si
Ge-Ge
Sn-Sn
Pb-Pb
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19. Which of these has the ions in the correct order of size?
I- > S2- > Li+ > F-
I- > S2- > F- > Li+
S2- > I- > Li+ > F-
F- > I- > Li+ > S2-
I- > Li+ > S2- > F-
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