Welcome Guest Search | Active Topics |

Tag as favorite
Question about After-Class Practice Set 1
Options
Previous Topic Next Topic
Mariana_6094
#1 Posted : Sunday, May 09, 2021 1:20:52 AM
Rank: Newbie

Groups: Registered
Joined: 4/29/2021
Posts: 1

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hello, I was doing the Prep 101 After Class practice set #1 and question 7, regarding the passage about iodine isotopes, states that Beta decay is more biologically damaging than Beta decay, but I thought it was the other way around? I just wanted to clarify this. Thank you!!
Back to top
Report?
Anjali_5681
#2 Posted : Friday, May 14, 2021 4:26:12 PM
Rank: Administration

Groups: Registered
Joined: 6/3/2020
Posts: 42

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hi Mariana,

This is one of the situations where not the full story is given here. Due to its mode of beta decay in 131-I, the isotope is much more dangerous to human health than 123-I, despite 123-I engaging in more gamma radiation (of which apparently it has a VERY short life span). The answer would be arrived at by information in the passage, where it specifically states that "90% of the radiative damage is caused by emitted beta particles" (in paragraph with 131-I.

Hope that helps!
Back to top
Report?
Users browsing this topic
Guest (3)
Tag as favorite
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Clean Slate theme by Jaben Cargman (Tiny Gecko)
Powered by YAF | YAF © 2003-2009, Yet Another Forum.NET
This page was generated in 0.072 seconds.