Why are there empty spaces in the rows on the periodic table?

Question

A. So that elements with similar masses are right next to each other.
B. Because elements of the same size are found in the same rows.
C. So that elements with similar properties are aligned in the same column.
D. Because the elements on the periodic table are arranged by order of discovery.

Answer 1

The correct answer is: C. So that elements with similar properties are aligned in the same column.

In the periodic table, empty spaces indicate where elements that share similar chemical properties would fit if they were discovered. This organization allows for a clear relationship between elements in the same group or column, highlighting their similar characteristics.