Mendeleev arranged the periodic table in order of increasing atomic weight of the elements. He determined that there was a pattern when he arranged these elements into horizontal rows.Continue Reading
Mendeleev placed the elements into horizontal rows in his periodic table of elements. He recognized a distinct pattern when he did this but only when he left some blanks in between certain elements. The pattern that he noticed was that certain chemical properties showed up at regular, periodic intervals in the vertical columns of the table.
Because there were blanks left in the table after it was arranged how Mendeleev wanted it to be, he predicted that there were many elements that had not yet been discovered. His periodic table received some controversy from other scientists for this reason. However, only a few years later there were more discoveries of elements being made. The periodic table provided the template for classification of elements by their chemical properties and atomic weight. It made it necessary to determine these details before classifying.
Mendeleev created his chart between the years of 1868 and 1870 as he was writing his book titled "The Principles of Chemistry." Although he is credited for the basic outline of the periodic table of elements, there were several scientists who came after him in completing the periodic table that exists today. Scientists brought about national pride for discovering elements.Learn more about Atoms & Molecules
The periodic table can be filled by tabulating elements in order of increasing atomic number. This method was first devised by Russian chemist Dmitri Ivanovitch Mendeleev in 1869 and has been used in physical and chemical science since.Full Answer >
Dmitri Mendeleev is widely credited as the creator of the periodic table. A charismatic Russian scientist who was fascinated by chemistry, Mendeleev came up with the idea to organize chemical elements according to their atomic number and other properties. The first periodic table was published by Mendeleev in 1869.Full Answer >
Dmitri Mendeleev published his periodic table of elements in 1869. His table arranged the known elements according to their chemical properties and in order of their relative atomic mass. This created several gaps in the periodic table and allowed him to predict eight other undiscovered elements correctly.Full Answer >
The periodic table arranges the known elements in order of increasing atomic number, which typically coincides with increasing atomic mass. Different rows on the table are known as periods. The period number assigned to each element signifies the highest energy level an electron within the element occupies in an non-excited state.Full Answer >