Question

The first periodic table developed by Mendeleev was not completely accurate, but was a great step toward accomplishing the periodic table of elements we use today. Explain how the modern periodic table is credible today because of Mendeleev’s work.

Answer 1

The answer is: elements in the same group of periodic system have similar properties.

Dmitri Mendeleev published a periodic table of the chemical elements in 1869.

Mendeleev noted gaps in the table and predicted then undiscovered elements existed eka-silicon (germanium) and eka-boron (scandium).

For example, germanium discovered in 1886 and it had proporties as Mendeleev predicted.

There are 118 unique substances (elements) arranged on an amazing chart that reveals their hidden secrets to anyone who knows how to read it.  

The first chemical element is hydrogen (atomic number is 1) and the last is oganesson (atomic number is 118).  

Elements are scheduled in periodic table, ordered by their atomic number.  

Answer 2

His periodic table provided everyone with the idea that elements should be arranged by the increasing order of their fundamental properties. It was later discovered that atomic number IS the fundamental property