[Answered] A pure sample of 226Ra contains 2.0 1014 atoms of the isotope. If the half-life of 226Ra = 1.6 103 ...

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Author Question: A pure sample of 226Ra contains 2.0 1014 atoms of the isotope. If the half-life of 226Ra = 1.6 103 ... (Read 179 times)

LaDunn

Hero Member
Posts: 526

on: Jul 28, 2018

A pure sample of 226Ra contains 2.0 1014 atoms of the isotope. If the half-life of 226Ra = 1.6 103 years, what is the decay rate of this sample? (1 Ci = 3.7 1010 decays/s)

Question 2

How much kinetic energy must a deuterium ion (charge 1.6 10-19 C) have to approach to within 10-14 m of another deuterium ion? (1 MeV = 1.6 10-13 J)

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emsimon14

Sr. Member
Posts: 344

Reply #1 on: Jul 28, 2018

Answer to Question 1

7.4 10-8 Ci

Answer to Question 2

140 keV

LaDunn

Hero Member
Posts: 526

Reply #2 on: Jul 28, 2018

emsimon14

Sr. Member
Posts: 344

Reply #3 on: Jul 28, 2018

You're welcome

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