Question

Diagonal relationship of elements in due to same:

• A. size
• B. mass number
• C. atomic number
• D. electron affinity

Answer 1

The correct option is A size

In addition to horizontal and vertical trends, there is a diagonal relationship between elements such as Li and Mg, Be and Al, B, and Si, that have an adjacent upper left/lower right relative location in the periodic table.

These pairs of elements have similar size and electronegativity, resulting in similar properties.

Diagonal relationships occur because of the directions in the trends of various properties as you move across or down the periodic table. Many of the chemical properties of an element are related to the size of the atom. Hence it is because of the same size.