You know about vertical relationships in the Periodic Table, for instance that C

Question

You know about vertical relationships in the Periodic Table, for instance that C and Si are similar because they are both in group 14. There are also similarities between elements that are diagonally related (diagonal relationships). Based on your answers to problem 4, do you think that there are strong similarities between Si and N or strong similarities between C and P? In general, do you think diagonal relationships will be "one down and one to the right" or "one down and one to the left" within the Periodic Table? Explain, based on the trends. Based on your answer to problem 5, do you think these diagonal relationships will be closer for second/third period combinations or third/fourth period combinations?

Explanation / Answer

In addition to horizontal and vertical trends in a periodic table,there is a diagonal relationship between certain sets of elements(Li and Mg, Be and Al, B and Si),that have upper left/lower right relative location in the PERIODIC TABLE. These pairs of elements share similar size & electronegativity, resulting in similar properties. Diagonal relationship occurs because crossing and desecnding periodic table have opposing effects. The diagonal relationship is due to increase in the charge in the ion and decrease in the size of ion as we move along the period. When we go down the group there will be decrease in the polarising power.These both cancel up when we move along the periodic table diagonally. http://education-portal.com/academy/lesson/the-diagonal-relationship-boiling-point-and-metallic-properties.html

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