Multiple Choice
Why is a neutral iron atom a different element from a neutral carbon atom?
A) A carbon atom has fewer neutrons in its nucleus than an iron atom.
B) An iron atom has more protons in its nucleus than a carbon atom.
C) An iron atom has more electrons than a carbon atom.
D) A carbon atom is bigger than an iron atom.
E) None of these is correct.
Correct Answer:

Verified
Correct Answer:
Verified
Q1: How much would you have to change
Q3: You observe the spectrum of two stars.Star
Q4: If you were driving down a deserted
Q5: A certain light wave has a frequency
Q6: As wavelength increases, the energy of a
Q7: If the frequency of a beam of
Q8: Astronomers have now found a large number
Q9: A red photon has a wavelength of
Q10: In the energy level diagram shown in
Q11: The difference in energy between the n