Measuring radioactivity without a Geiger counter... how did Marie Curie do it?
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- čas přidán 10. 07. 2024
- As Women's History Month continues, Professor Davis explains how Marie Curie was able to make measurements of radioactivity with 1890's technology, and how her measurements led to the discovery of two new elements!
Read more about Marie Curie's accomplishments:
history.aip.org/exhibits/curi...
Find my Wondrium course HERE:
www.wondrium.com/understandin...
Pitchblende image attribution:
Jędrzej Pełka, CC BY-SA 3.0 creativecommons.org/licenses/..., via Wikimedia Commons
All other images are public domain or copyright ChemSurvival Enterprises, LLC
very well explained Sir
Prof, can you explain how did she know what methods to use to extract these new elements and how the purity was measured?
Absolutely Beautiful explanation. Thanks Professor.🙏
Thanks for watching!
Excellent video! Thanks!
This and some of the recent videos were very interesting. I hope your channel will grow.
Thanks so much! If you haven't already, subscribe to the channel for another video dropping later this week B-)
Great !! In fact, uranium mineral was previously processed before expousing to Curies´ electrometer.This is the main reason for increasing radiactivity in comparison witn uranium metal.
tyvm for reaall very enjoyable too
I know this isn't relevant to the video but I need some help with a question for school, and I think you would be able to help :)
Unfortunately the original question is not in english, and I don't know the words to translate it, so I'm hoping you will understand the question even though it's very out of context.
I need to explain why the partitioning coefficient of penicillin G depends on pH of the aqueous phase (the coefficient increases as pH decreases). I have to explain it on the basis of the structure of penicillin G and the structure of butyl acetate, which is the organic phase.
You have a video on this topic where you mention the hasselbach equation, but i don't think I can use this, as it doesn't seem to be in our curriculum, and the fact that the question seems to imply that my explaination must be based on the structures of the molecules.
I would really appreciate any help I can get! :)
worth a zoom meeting... contact me here to set something up chemsurvival.com/contact
How can an electric motor eork with only one source of electric power? (3:09)
adds value ty
Very interesting and good explanation! So she couldn't measure the exact radioactivity but could compare the materials and say.. okay this one has a higher radioactivity because the time for the dot on the ruler to move again was shorter? But how did she knew which weight to use? And the weight had to be removed very slowly or why was this electrometer so difficult to use in practice? Thank you 🤩
As the story goes the technique requires quite the sleight-of-hand and Marie was a master of it. As for your question about the weight, all that matters is that the same piezo-electric crystal and the same laboratory weight are used in experiments to be compared. Everything down to and including the mass of the sample must be the same. These are things that a scientist would call "controls". Only the identity sample itself can differ, otherwise the results of the experiment become ambiguous.
czcams.com/video/TFi5bLrbBJ4/video.html una radiografia con la pechblenda di Marie Curie