/u/blueredscreen's posts in /r/askscience

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How do we find out if electrons are not elementary?

335 upvotes

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Why does adding just a single proton to an atom completely change its chemical and physical properties, and change it into a new element?

46 upvotes

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What are the differences between alpha particles and helium nuclei?

38 upvotes

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What is the actual physical mass of a photon?

33 upvotes

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Is it possible to "add" protons to an atom in a lab/accelerator and discover new elements? And why does an atom having just an extra proton than another atom make the two completely different elements? What property of protons causes this, if any?

16 upvotes

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What is the fastest algorithm for multiplication of two n-digit numbers?

11 upvotes

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Is it possible to know if a hash function can have collisions just by observing its algorithm?

9 upvotes

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Is there a cryptographic system that does not depend on a specific problem being hard to solve?

8 upvotes

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[Chemistry] Air is around 70% Nitrogen, and yet none of it affects any chemical reactions. Why?

6 upvotes

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How do efficient video codecs like HEVC and VP9 work?

5 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How do we find out if electrons are not elementary?	335
Why does adding just a single proton to an atom completely change its chemical and physical properties, and change it into a new element?	46
What are the differences between alpha particles and helium nuclei?	38
What is the actual physical mass of a photon?	33
Is it possible to "add" protons to an atom in a lab/accelerator and discover new elements? And why does an atom having just an extra proton than another atom make the two completely different elements? What property of protons causes this, if any?	16
What is the fastest algorithm for multiplication of two n-digit numbers?	11
Is it possible to know if a hash function can have collisions just by observing its algorithm?	9
Is there a cryptographic system that does not depend on a specific problem being hard to solve?	8
[Chemistry] Air is around 70% Nitrogen, and yet none of it affects any chemical reactions. Why?	6
How do efficient video codecs like HEVC and VP9 work?	5