An electron has a ________ electric charge. Fill in the ...

[luminitza]

An electron has a ________ electric charge.
 
  Fill in the blank(s) with correct word

Question 2

Why do O stars exhibit weak hydrogen absorption lines?
 
  A) At these high temperatures, nearly all the hydrogen is ionized, and is therefore unable to interact with light.
  B) O stars are too cool to excite hydrogen atoms to the first energy level from which they can then absorb visible wavelengths of light.
  C) O stars contain very little hydrogen.

[fdliggud]

Answer to Question 1

negative

Answer to Question 2

A