Question

Messelson & Stahl used ${}^{15}N$ for their classical experiment because

• A. it is radioactive
• B. it is an unstable isotope
• C. it is a heavy isotope and can be separated from ${}^{14}N$ on the basis of density
• D. it is a light isotope and can be separated from ${}^{14}N$ on the basis of density

Answer 1

The correct option is C it is a heavy isotope and can be separated from ${}^{14}N$ on the basis of density

Messelson & Stahl used ${}^{15}N$ for their classical experiment because it is a heavy isotope and can be separated from ${}^{14}N$ on the basis of density using CsCl based density gradient centrifugation.