21. Nuclear Chemistry
Neutron to Proton Ratio
1PRACTICE PROBLEM
Even though the elements in the lanthanide series have comparable chemical reactivity, their abundances in the crust of the Earth differ by two orders of magnitude. The graph below displays the relationship between relative abundance and atomic number. Which statement explains why elements with even atomic numbers have more abundant isotopes?
![](https://lightcat-files.s3.amazonaws.com/problem_images/55db4ec2b2e40a89-1667404522722.jpg)
Even though the elements in the lanthanide series have comparable chemical reactivity, their abundances in the crust of the Earth differ by two orders of magnitude. The graph below displays the relationship between relative abundance and atomic number. Which statement explains why elements with even atomic numbers have more abundant isotopes?