A heavy neutral atom, such as iron, produces many spectral lines ...

[Tirant22]

A heavy neutral atom, such as iron, produces many spectral lines compared to light elements like hydrogen and helium. Why?
 
  A) Because of the larger number of electrons and corresponding energy levels, more transitions are possible.
  B) Because of the larger number of electrons, there are many ionization levels possible.
  C) Because of the larger number protons, the amount of force holding the electrons to the atom can vary between different iron atoms.
  D) Because of the atom's larger size, it will be hit by more photons in a beam of light.

Question 2

How long does it take an O-type star to form, compared to the time for a solar-type star to form?
 
  A) 1/300 as long
  B) 1/30 as long
  C) about the same time
  D) 30 times longer
  E) 300 times longer

[raili21]

Answer to Question 1

A

Answer to Question 2

B

[Tirant22]

TYSM

[adf223]

Gracias!