Diagonal Relationships of the Periodic Table [ENDORSED]

[Jasmine Wu 1L]

Section 2.13 of the textbook briefly explains the concept of diagonal relationships, but I don't quite understand it.

Do you know if we need to know this for Test 3, or if it would be a good idea to commit this concept to memory for future reference?

Thanks!

[Evelyn L 1H]

This would definitely be something to study because the test covers everything from section 1.5 and all of chapter 2.

[Chem_Mod]

On the other hand I would recall what I have said multiple times in class:

Focus on the homework problems I assigned. :-)

See "Outline 2: The Quantum World" on my class website for details.

[miznaakbar]

Number 71 in the assigned ch 2 homework problems asks about diagonal relationships, and it simply means the similarity in chemical properties between an element and the element lying one period lower and one group to the right. For instance, similarities between the lithium ion (+1) and magnesium ion (+2) have to do with their diagonal relationship. Diagonal relationships arise because of the similarity in the size of the two elements' ions - the lower right element would be larger since it is in a higher period but it also has a higher oxidation sate (which will make it smaller) essentially making the two diagonal ions similar in size.

[Maya Krishnan 3E]

I understand how Al and Ge are diagonally related. Yet when asked to find the charge of the diagonally related elements, how does one find the charge for each element to be Al3- & Ge4+?