How are isotopes used in biological research?

The abundance of $""_8^16"O"$ is 99.762 %, and the abundance of $""_8^18"O"$ is 0.201 %. Assume you have 100 000 atoms of O. Then you have 37 atoms of $""_8^17"O"$...

As an unstable nucleus decays, it emits radiation. This radiation can then be used for many things in hospitals. Gamma radiation is concentrated and focused on a tumour in order...

They are used to track compounds through biological processes.Here is an illustration from early genetics research. Alfred Hershey and Martha Chase used radioactive isotopes of sulfur (S-35) and phosphorus (P-32)...

Only a limited number of radioisotopes can be used in biological research because they must meet specific qualifications. Most importantly, they have to be that naturally occur in the experimental...

The idea with that have two naturally occurring is that the percent abundances of those two must add up to give $100%$. In calculations, it is often easier to...

We know that: $x_(1)106.9059 + x_(2)108.9047 = 107.8682$ $(i)$ $x_(1) + x_(2) = 1$ $(ii)$ We assume that silver has only the 2 , which for a first approximation...

$color(white)(XX)$mass(amu)$color(white)(X)$Isotopic abundance Br-79$color(white)(XXXX)$78.92$color(white)(XXXXXXX)$? Br-81$color(white)(XXXX)$80.92$color(white)(XXXXXXX)$? $"average atomic mass"=("mass*%"+"mass*%"+"mass*%"...)$ Let x be % abundance of Br-79 Let 1-x be % abundance of Br-81 Br is 79. 904g/mol on $color(orange)"(average atomic mass)"$ $79.904%=x+(1-x)$...

Isotopes, $""^15N$, $""^13C$, are the same chemically as the isotope they replace. They are not the same spectroscopically. Mass spectroscopy would certainly differentiate between the isotopes. In addition, there might...

: The number of protons in an atom, NOT the number of neutrons Isotope: An element with a varying number of neutrons Remember, we CANNOT change the number of protons...

$75%$ of all X atoms are X-28, which means that $25%$ of all X atoms are X-24 as there are only 2 . Then, you do the multiplied by...