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12:15 PM
Why is it that alpha-particles can pass through gold but not lead?
 
9
Q: Why can't light pass through a gold foil, but alpha particles can?

user7480Rutherfords experiment showed that most of the alpha particles passed through a thin gold foil undeflected. So why can't light pass through the foil, which is supposedly thinner than the heavy alpha particles?

Not a very satisfactory explanation, but it's something
 
 
4 hours later…
4:31 PM
I have a linear butane whose second carbon from the left is bonded to a chlorine and then the third carbon is bonded to two methyls. Am I correct in naming this
2-chloro - 3,3-dimethyl - butane ?
My doubt comes from the fact that both ends of the chain are next to a carbon which ramifies. I know the simpler ramification is the one that "prevails". So I would think the question can be reformulated: is chlorine simpler than two methyls?
 
 
5 hours later…
10:01 PM
@VincenzoOliva Halogen atoms have precedence over methyl groups, see here chem.uiuc.edu/GenChemReferences/nomenclature_rules.html
So 2-chloro is correct
 
11:00 PM
@jonsca You there? I have an issue which may require intervention of a moderator
Take a look at the comments in this question chemistry.stackexchange.com/questions/31960/…
 
11:38 PM
@jonsca Thanks!
 

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