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Author Question: Which element represented most of the atoms in the early Universe? a. helium b. hydrogen c. ... (Read 223 times)

OSWALD

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on: Jul 27, 2018
Which element represented most of the atoms in the early Universe?
 
  a. helium
 b. hydrogen
  c. oxygen
 d. carbon
 e. nitrogen

Question 2

Hydrogen lines are weak in the spectra of hot O-type stars because ____.
 
  a. most of the hydrogen has been converted to helium
 b. a good spectrum of these stars is difficult to obtain
 c. these stars have no atmosphere
 d. gravitational pressure pushes all the hydrogen lines out of the visible spectrum
  e. most of the hydrogen is ionized to high energy levels


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stanleka1

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Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

e


OSWALD

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Reply #2 on: Jul 27, 2018
Thank you!


stanleka1

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Reply #3 on: Jul 27, 2018
Always glad to help...


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