Select all that apply Which were features of Mendeleev's periodic table? elements in columns had similar properties I blank spaces predicted elements yet to be discovered the arrangement of elements was based on electron configuration atomic masses were determined by mass spectrometer

Question

Select all that apply Which were features of Mendeleev's periodic table? elements in columns had similar properties I blank spaces predicted elements yet to be discovered the arrangement of elements was based on electron configuration atomic masses were determined by mass spectrometer

Answer 1

The correct options are A and B.

Answer 2

## Step 1Mendeleev's periodic table was a significant contribution to the field of Chemistry. It had distinct features that set it apart from the modern periodic table.## Step 2One of the key features of Mendeleev's periodic table was that elements in each column had similar properties. This was based on their atomic weights, not their atomic numbers as we use today. ## Step 3Another feature was the presence of blank spaces in the table. Mendeleev predicted that these spaces were for elements that had not yet been discovered, but would fit into the table based on their atomic weight and other properties.## Step 4The concept of electron configuration, which is the basis for the modern periodic table, did not exist during Mendeleev's time. This concept was formulated later, based on quantum mechanics.## Step 5Similarly, the technique of mass spectrometry, which is used to determine atomic masses, was not developed until the 20th century. This is a significant difference from Mendeleev's time.

Question

Select all that apply Which were features of Mendeleev's periodic table? elements in columns had similar properties I blank spaces predicted elements yet to be discovered the arrangement of elements was based on electron configuration atomic masses were determined by mass spectrometer

Answer

Answer

Explanation