2. He created a classification of elements based on their atomic weight.

3. It is a one-dimensional point which contains a huge mass in an infinitely small space.

4. He noticed that shooting electrons at elements caused them to release x-rays at unique frequencies.

5. He synthesized element with atomic number 43 using a linear particle accelerator.

6. This is known as the origin and production of heavy elements.

7. This is known as the origin of light elements.

8. Process that can produce elements up to #83 - Bismuth.

9. This is also known as Nucleosynthesis.

10. This occurs in the main sequence of stars.

11. It is also known as nuclear fusion and the formation of new nuclei actions in the early stages of development of the universe.

12. In this process, there’s a buildup of a VERY heavy isotope, then as beta-decays occur, you march up in atomic number and produce heavy product.

13. He successfully carried out a nuclear transmutation reaction, a process of transforming one element or isotope into another element.

14. It was created by bombardment of molybdenum by deuterons (heavy hydrogen, H12), by Emilio Segre and Carlo Perrier in 1937.

15. These are elements with atomic numbers beyond 103.