1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Excited vs. Ground state masses of atom

  1. Dec 7, 2009 #1
    1. In a certain gamma decay process, an excited neon atom emits a gamma-ray that has an energy of 1.630 MeV. The neon atom in the ground state has a mass of 19.992 435 u. What is the mass of the excited neon atom?

    2. I am pretty lost here. There must be a formula relating these energies to masses somewhere, but I do not know it.
  2. jcsd
  3. Dec 7, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Try E = mc2.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook