If a nucleus decays by gamma decay to a daughter nucleus, which ...

[Coya19@aol.com]

If a nucleus decays by gamma decay to a daughter nucleus, which of the following statements about this decay are correct? (There may be more than one correct choice.)
 
  A) The daughter nucleus has more protons than the original nucleus.
  B) The daughter nucleus has more neutrons than the original nucleus.
  C) The daughter nucleus has the same number of nucleons as the original nucleus.
  D) The daughter nucleus has fewer protons than the original nucleus.
  E) The daughter nucleus has fewer neutrons than the original nucleus.

Question 2

In a ruby laser, an electron jumps from a higher energy level to a lower one. If the energy difference between the two levels is 1.8 eV, what is the wavelength of the emitted photon?
 
  (c = 3.00  108 m/s, h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
  A) 350 nm
  B) 470 nm
  C) 650 nm
  D) 690 nm
  E) 960 nm

[Sammyo]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: D

[Coya19@aol.com]

Excellent

[Jossy]

Gracias!