In 1913 Henry Moseley discovered the atomic numbers of all the elements and helped correctly order all the elements in the periodic table
Hi, I'm Henry Moseley, I discovered the atomic number of every element.
He discovered the atomic numbers using a machine he created that shot high energy electrons at elements. When the electrons hit the elements they created x-rays in which the size of the x-ray's wavelength was directly proportional to what the atomic number of the element was.
This is my x-ray machine.
CitationsBritannica, The Editors of Encyclopaedia. “Henry Moseley.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., www.britannica.com/biography/Henry-Moseley.https://www.famousscientists.org/henry-moseley/ Study.com, Study.com, study.com/academy/lesson/henry-moseley-biography-atomic-theory.html.