Iodine-131 is a radioactive isotope, and is often used in certain medical treatments. It has a short half-life of about 8 days. If a hospital has a 750mg sample of it available, how much would be available after 48 days?

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c