[Ag(NH3)2][Ag(CN)2] is named as:
diamminesilver(I) dicyanoargentate(I)please explain me,why it is named as this,and why the name of central atom differ since both are Ag.Nomenclature of coordination compounds is very well explained in study material, please refer to the given link:
https://www.meritnation.com/cbse/class12-science/studymaterial/chemistry/chemistry-part-i/matter-in-our-surroundings/17_268_9059#slide1_nomenclature-of-coordination-compounds