Modern periodic table A 13141516 3A 4A 5A 6A N 03 4567 01121 6 17 0iL 2 38 4B SB 6B 7B 8B IB 2B Alsa S 21 Ped副副回圆图要高 72 73 74 76 Hf Ta W R Metals s e m m sm ea ca i Ds Er m r Lu Metalloid Nonmetals 2.4Period Group Alkali Metal Noble Gas Halogen Alkali Earth Metal 2.4