When Mendeleev developed his periodic table,he placed the greatest emphasis on
A)the atomic number of the elements.
B)putting elements with similar properties in the same column.
C)leaving no holes or blank spaces in the table.
D)the melting points of the elements.

Question

Quizplus · Accepted Answer

Mendeleev's periodic table was based on arranging the elements in order of increasing atomic mass, but he also made sure to group elements with similar properties together in the same column or group. This allowed for the prediction of the properties of unknown elements, as well as the identification of elements with similar chemical behaviors. The other choices were not the primary focus of Mendeleev's table.

When Mendeleev Developed His Periodic Table,he Placed the Greatest Emphasis