Uploaded September 2023 | Updated September 2026, 2 hours ago
You can find all my A Level Chemistry videos fully indexed at freesciencelessons.co.uk/a-level-revision-videos/a-level-chemistry
In this video, we look at naming aromatic compounds. First we explore compounds with one substituent on the benzene ring for example methylbenzene. We then look at some non-systematic names such as benzaldehyde. Finally, we explore how to name aromatic compounds with multiple substituents on the benzene ring.
You can find all my A Level Chemistry videos fully indexed at freesciencelessons.co.uk/a-level-revision-videos/a-level-chemistry
In this video, we look at naming aromatic compounds. First we explore compounds with one substituent on the benzene ring for example methylbenzene. We then look at some non-systematic names such as benzaldehyde. Finally, we explore how to name aromatic compounds with multiple substituents on the benzene ring.



![GCSE Biology Revision Microscopy
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In this video, we look at microscopes. First we explain the advantages of an electron microscope over a light microscope and then we learn how to carry out calculations based on magnification.
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Image credits:
Light microscope By Kitmondo Marketplace - Olympus BH-2 BHT Trinocular Laboratory Microscope, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=50226403
Leewanhoek microscope By Jeroen Rouwkema, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3657142
Electron microscope By Cjp24 - Own work, GFDL, https://commons.wikimedia.org/w/index.php?curid=13317336
Fibroblast By SubtleGuest - slika uzeta sa engl. vikipedije [1], CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=2903074
Nucleus Public Domain, https://commons.wikimedia.org/w/index.php?curid=3266416
Ruler By Luigi Chiesa - Photo taken by Luigi Chiesa, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=1137573
Cheek cells
https://commons.wikimedia.org/wiki/File:Cheekcells_stained.jpg
Mulletsrokk, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons GCSE Biology Revision Microscopy](https://i.ytimg.com/vi/L5StAE_uuxM/mqdefault.jpg)






