Recent content by phost

I hadn't considered that. That was really helpful, thanks a lot :D

Well, if I assume that, it is plausible because potassium-40 will lose 1 electron and becoming argon-40 with beta minus decay. But I still don't understand it, was the assumption says the rock originally a pure potassium-40 back then and becoming argon-40 in the whole time? Or is it in the first...

It's kind of baffling me when I'm encountering this question in this sub-chapter. It's just unusual. So I really need your help :D Homework Statement If a rock sample was found to contain 1.16 × 10-7 mol of argon-40, how much potassium-40 (t1/2 = 1.3 × 109 yr) would also have to be...

Anyway, your question suddenly made up my mind to look up those things you said. And so far after you asked, I've found those data and it also makes the question I posed before answered. Thanks =)

Hello guys, nice to meet you all. It's kinda awkward since I'm new here and also just a freshmen in my university :) Anyway, I'm conducting a study about the LED components, whom I've already known it is consist of aluminium and Gallium Arsenide (GaAs) or Gallium Phosphide (GaP) or Gallium...