What was the problem with Dobereiner's periodic table?

Answer 1

Dobereiner's Periodic Table, proposed in the early 19th century, attempted to group elements into triads based on their similar chemical properties. However, this classification system was limited as it only included a few elements and did not account for all known elements at the time. Additionally, the triads were based on average atomic masses, which were not always accurate due to the existence of isotopes. This led to inconsistencies and inaccuracies in the arrangement of elements.

Answer 2

Dobereiner is remembered for what were called "Dobereiner's Triads" which are groups of three elements having similar chemical properties. This is a forerunner of the periodic table, but it is not actually a table, and it does not offer any explanation for the chemical similarities observed within the triads. Mendeleev's Periodic Table of the Elements shows the relationship of every element to every other element, and explains why they all have the chemical properties that they have.

Answer 3

Dobereiner's periodic table had limitations because it only grouped elements into triads based on similar chemical properties, without considering atomic number or structure. This led to inconsistencies when new elements were discovered that did not fit into his triads. As a result, the concept was eventually replaced by more modern periodic table arrangements.