The basic organization structure was by Atomic Mass, which while it may follow a trend of increasing with each progressing element on the modern table, which is organized by atomic number or number of protons, there are a few exceptions, such as Argon having a greater atomic mass than Potassium, even though Argon has one less proton.
to classify the elements mendeleev arranged the elements in increasing order of their atomic mass and he also considered their reaction with hydrogen and oxygen
atomic mass
Madeleev originally arranged the elements in the first periodic table by their average atomic masses. Later it was changed to atomic number by Moseley, or the number of protons each of that element's atom has.
Dmitri Mendeleev and Julius Lothar Meyer independently published there versions of the Periodic Table between 1869 and 1870. Mendeleev's version would become the foundation of the table used today.
Dmitri Mendeleev used the property of bonding power when developing his periodic table. Bonding power refers to the number of bonds an element forms during a chemical change. But Mendeleev could not explain bonding power because he didn't know about the structure of atoms. (search Dmitri Mendeleev's periodic table)
The modern periodic table is based on the periodic law, which states that physical and chemical propertiesof the elements are a periodic function of their atomic numbers.Yes this answer is good!
to classify the elements mendeleev arranged the elements in increasing order of their atomic mass
Atomic Mass.
Mendeleev created his Periodic Table at the time when presence of sub-atomic particles like electrons, protons and neutrons were not discovered.So, the term atomic number was not known till now. So , he positioned the elements in increasing order of atomic mass because Atomic Mass of many elements discovered till then were known.
What elements are similar to iron in a chemical property on the Periodic Table
atomic mass
Known elements were arranged by increasing mass.
Madeleev originally arranged the elements in the first periodic table by their average atomic masses. Later it was changed to atomic number by Moseley, or the number of protons each of that element's atom has.
Dmitri Mendeleev and Julius Lothar Meyer independently published there versions of the Periodic Table between 1869 and 1870. Mendeleev's version would become the foundation of the table used today.
what property does each of the elements have
After atomic numbers Henry Moseley supported the arrangement of periodic table of Mendeleev after atomic numbers and properties by a strong physical conception: study of the lines of X-ray spectra of chemical elements. It is a true relation between atomic numbers of elements and the wavelenghts of the characteristic X-ray lines.
Dmitri Mendeleev (in his periodic table, who arranged according to increasing atomic mass). Niels Bohr in the modern periodic table, where the elements are arranged in increasing atomic number.
atomic number