ISS is sensitive to every element heavier than which of the following?
A. Helium
B. Hydrogen
C. Nitrogen
D. Neon
Answer:A
ISS is sensitive to every element heavier than which of the following?
A. Helium B. Hydrogen C. Nitrogen D. Neon
Explanation: ISS is sensitive to every element heavier than helium. The lightest isotope used as primary ion is that of helium.