Neutral hydrogen atoms are best studied from their energy given ...

[rlane42]

Neutral hydrogen atoms are best studied from their energy given off as
 
  A) 21-cm waves in the radio region.
  B) 0.2 nm as X-rays.
  C) 121.3 nm as Lyman alpha emission in the UV.
  D) red hydrogen alpha emission, at 656.3 nm.
  E) Neutral hydrogen gives off no detectable radiation, since it is cold, not hot.

Question 2

Which common gas is less abundant in the top of Saturn's atmosphere, compared to what we observe at Jupiter?
 
  A) methane B) nitrogen C) helium D) hydrogen E) argon

[janeli1]

Answer to Question 1

A

Answer to Question 2

C