CC2 unit 7: 3 questions and a look see

Hi All,
I have not posted for about a week!
Things have been going on, and I am sick. Not serious sick; just a bothersome cold that makes me want to nap all the time. My nose is chapped from blowing it all the time too, ouch!
I hope you all had a happy Christmas, and are going to have a good New Year too. I made sure one thing was going to be better for me. I consolidated all my debts. I will now be out of debt in less than three years, or even less time if I can help it. I get my new mortgage in about a week, my modification, that took me all year to do on top of everything else. I guess what I am saying is I am not going to let these companies push me around anymore. But I did it legally, and without bankruptcy. It was hard to do for sure, but worth it!!!
On to unit 7.
Q1. I personally hate doing it, peer reviews. I feel like anyone who has enough gumption to even turn in a paper should get credit. I know it has to be collegiate and professional; however, I am not a professional. I do not have the right to evaluate an others' work.
Q2. In my paper my Ah Ha was when I realized the name of my paper. Thallium is a necessary evil. They need it to look for cancer; it is in the equipment lens. They give it to patients to follow the route of the thallium and find a cancerous cell or cells. Then the people that have access to it can do other things with it. It would be another paper to find out their clearances for access.
Q3. That the element thallium is still available. It lies in between mercury and lead, which are both illegal to put in a human body, yet they still use thallium. I do not get it. They say it is safe in a small amount. How safe is a small amount, what is a small amount? You are talking about a poisonous heavy metal. I would not put that in my body!!
Thank you, Happy New Year.
Lara