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Physics 14 Online
OpenStudy (anonymous):

Why is helium in earths crust?

OpenStudy (aaronq):

It's a product from the decay of uranium

OpenStudy (anonymous):

Thanks man. Figured it out myself a bit ago, but it is nice knowing people care :P

OpenStudy (aaronq):

haha no problem, yeah sometimes it takes awhile to get an answer lol

OpenStudy (anonymous):

If I bombard you with a few more question in a bit, you available?

OpenStudy (aaronq):

i might be, can't promise anything though

OpenStudy (anonymous):

What is the charge on the subatomic particles represented in figure 4-3? Assuming all the particles in the nucleus are visible, what are the atomic and mass numbers of the atom shown?

OpenStudy (anonymous):

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