15 December 2023

Testing for Gases

Testing for gases. A student came to me and asked what were the tests for gases. She had had a school lesson but hadn't done or seen a demo. We tested for oxygen, hydrogen, carbon dioxide and Chlorine. She now knows the tests.


 

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Seeing the Invisible – Electrons in a Cathode Ray Tube

Seeing the Invisible – Electrons in a Cathode Ray Tube Electrons… tiny, negatively charged particles that you can’t see, touch, or smell. Y...