jan 1, 1913 - Moseley
Description:
Moseley had discovered that the basic difference between elements is the number of protons they have. He realized that an element is defined by its number of protons. He found a relationship between the frequencies of corresponding lines in the X-ray spectra. In a paper published in 1913, he reported that the frequencies are proportional to the squares of whole numbers that are equal to the atomic number plus a constantAdded to timeline:
Date:
jan 1, 1913
Now
~ 112 years ago