- #1
rayray2216
- 5
- 0
Homework Statement :
the binding energy for the electron in the ground state of hydrogen-2 is 13.6ev
what is the corresponding mass defect of the hydrogen atom in amu (atomic mass units)
not sure if you need atmoic mass of the hysgrogen atom its given to be 2.014102u
Relevant equations:
not really sure but i know that nuclear binding energy=Mass defect x c^2
so BE/c^2=Mass deffect
931.58=uc^2
The attempt at a solution:
Havent really got a clue how to start i thought you would just use the above formula but i feel i am wrong :s1 amu = 931.46 MeV/c2 = 0.93146 GeV/c2
1 MeV/c2 = 1.074 × 10–3 amu
Thus 13.6 eV = 13.6 x 10^-6 MeV
=>13.6 eV = 13.6 x 10^-6 x 1.074 x 10^-3 x (3 x 10^8)^2 amu
=>13.6 eV = 1.32 x 10^9 amu
but i feel this is very wrong
the binding energy for the electron in the ground state of hydrogen-2 is 13.6ev
what is the corresponding mass defect of the hydrogen atom in amu (atomic mass units)
not sure if you need atmoic mass of the hysgrogen atom its given to be 2.014102u
Relevant equations:
not really sure but i know that nuclear binding energy=Mass defect x c^2
so BE/c^2=Mass deffect
931.58=uc^2
The attempt at a solution:
Havent really got a clue how to start i thought you would just use the above formula but i feel i am wrong :s1 amu = 931.46 MeV/c2 = 0.93146 GeV/c2
1 MeV/c2 = 1.074 × 10–3 amu
Thus 13.6 eV = 13.6 x 10^-6 MeV
=>13.6 eV = 13.6 x 10^-6 x 1.074 x 10^-3 x (3 x 10^8)^2 amu
=>13.6 eV = 1.32 x 10^9 amu
but i feel this is very wrong
Last edited: