Answer:
2 and 1 are sig figs.
Explanation:
any number that is not zero is a sig fig (exceptions do apply)
I believe it is ni . Hope this helps
The average atomic mass of N2 is 14.0067. The atomic masses of the 2 stable isotopes of nitrogen, N-14 and N-15, are14.003074002 and 15.00010897 amu, respectively. Calculate the percent abundance of each nitrogen isotope. Ex.: The average atomic weight of copper is 63.5amu .
hope this helps!!!