Using the atomic masses and relative abundance of the isotopes of nitrogen given below, determine the average atomic mass of nitrogen.
n-14: 14.003 amu; 99.63%
n-15: 15.000 amu; 0.37%

a)14.003 amu

b)14.007 amu

c)14.506 amu

d)15.000 amu

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.