It is a device that is used to speed up the protons to overcome the repulsion between the protons and the target atomic nuclei by using magnetic and electrical fields.

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

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

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

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