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

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Why was the number 299,792,458 chosen as the definiton of a metre instead of a more rounded off number like 300,000,000?

6953 upvotes

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How was Avogadro's number derived?

3169 upvotes

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Where did all the salt in the oceans come from?

41 upvotes

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Why is americium used in smoke detectors and not any other transuranic element?

35 upvotes

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How can we see light beams even when they are not pointing towards us?

9 upvotes

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What's the difference between valency and oxidation states?

6 upvotes

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Why do some compounds e.g. water, methane, ammonia have special names instead of "dihydrogen monoxide", "carbon tetrahydride"?

5 upvotes

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It is possible for planets to orbit a star on different planes?

4 upvotes

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What makes a particle unstable?

2 upvotes

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What happens when you charge an electronic device which has a full battery?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why was the number 299,792,458 chosen as the definiton of a metre instead of a more rounded off number like 300,000,000?	6953
How was Avogadro's number derived?	3169
Where did all the salt in the oceans come from?	41
Why is americium used in smoke detectors and not any other transuranic element?	35
How can we see light beams even when they are not pointing towards us?	9
What's the difference between valency and oxidation states?	6
Why do some compounds e.g. water, methane, ammonia have special names instead of "dihydrogen monoxide", "carbon tetrahydride"?	5
It is possible for planets to orbit a star on different planes?	4
What makes a particle unstable?	2
What happens when you charge an electronic device which has a full battery?	1