There are 18 families of core structures on the Periodic Table but 8 are the fundamental ones most involved in our lives.
Gabaydan oo ahaa kuwa badan ayaa haatan waxaa noo suura gashay 8 gabay oo kamid ahaa kuwii oogu muhiimsanaa in aan diin soo gudbino halkan hoose ka dhagayso gabayda oo dhan