Mendeleevs Table

Question 1

Describe how Mendeleev arranged the elements known to him

Answer 1

In order of increasing atomic mass , taking into account the properties of the elements and their compounds

Question 2

What were the reasons why other scientists at the time thought that his table was not correct?

Answer 2

It contained gaps , he occasionally swapped the places of elements and some groups contained both metals and non metals.

Question 3

Why did he leave gaps?

Answer 3

For the undiscovered elements. He was able to use his table to predict the properties