Chapter 8: Periodicity
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Identify the s, p, d and f blocks in the periodic table
Shape of s and p orbitals
shape of d orbitals (beyond AS; useful though not essential for A Level)
trends in melting and boiling points of Period 3 elements
Explain the trends in melting and boiling points across period 3 (Na to Ar)
Increase from Na to Al because of increase of metalic bond strength (Na has one deleocalised electron per atom; Al has 3 delocalised electrons per atom). Si is highest becuase it is giant covalent, so to melt, need to overcome strong covalent bonds. From P to Cl, we go from S8 to P4 to Cl2. The bigger the molecule, the more electrons and so the larger the instantaneous dipole. Ar is monatomic.
Trend in atomic radius from H to Ca
