# Calculate Mass Defect of Nitrogen

1. Dec 7, 2008

### jcvince17

1. The problem statement, all variables and given/known data
For the common isotope of nitrogen, 14N, calculate the mass defect.

2. Relevant equations

$$\Delta$$M = Zmp + Nmn - M

3. The attempt at a solution

7(1.00727646688)+7(1.00866491560)-14.003074

$$\Delta$$M = .108516177

Masteringphysics says this is wrong. says i may have made a rounding error? i have input three variations of this answer but all have been wrong.

where am i making the mistake.