Periodic Table Vs Heat of Fusion - Help!!! (1 Viewer)

[LFan04]

Does anyone know how the heat of fusion is related to how elements are arranged on the periodic table?

Also, why indium has a higher heat of fusion than thallium?

Why arsenic has a higher heat of fusion than tin?

Thank, guys! I really need your help!

 

[Zarathustra]

Is that even in the syllabus?