Uploaded April 2024 | Updated September 2026, 2 days ago
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In this video, we continue looking at how electrons are shared during covalent bonding. We look at how the atoms are covalently bonded in an oxygen molecule (which contains a double covalent bond), a nitrogen molecule (which contains a triple covalent bond) and a carbon dioxide molecule (which contains two double covalent bonds).
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Chemistry. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Find your 9s with PLUS. Click the link to try for free freesciencelessons.co.uk/modules/gcse-chemistry-1-triple
Teachers, to get PLUS for your school, email schools@freesciencelessons.co.uk
In this video, we continue looking at how electrons are shared during covalent bonding. We look at how the atoms are covalently bonded in an oxygen molecule (which contains a double covalent bond), a nitrogen molecule (which contains a triple covalent bond) and a carbon dioxide molecule (which contains two double covalent bonds).
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Chemistry. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.




![GCSE Biology Revision Digestive Enzymes
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In this video, we look at the specific enzymes found in the digestive system. We start by looking at the lock and key theory which explains why enzymes are specific. We then look at each of the three enzymes in digestion.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Biology. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Deliberate Thought by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/royalty-free/?keywords=deliberate+thought
Artist: http://incompetech.com/
Image credits:
Human digestive system Lozzaaa [Public domain], via Wikimedia Commons GCSE Biology Revision Digestive Enzymes](https://i.ytimg.com/vi/ypHpbHfDJsA/mqdefault.jpg)
