actinide lanthanide alkali earth metals noble gases transition metals unknown alkali metals nonmetal halogen metalloid post transition metal H 1 Li 3 Na 11 K 19 Rb 37 Cs 55 Fr 87 Be 4 Mg 12 Ca 20 Sr 38 Ba 56 Ra 88 Sc 21 Y 39 La 57 Ac 89 Ti 22 Zr 40 Hf 72 Rf 104 V 23 Nb 41 Ta 73 Db 105 Cr 24 Mo 42 W 74 Sg 106 Mn 25 Tc 43 Re 75 Bh 107 Fe 26 Ru Os 76 Hs 108 Co 27 Rh 45 Ir 77 Mt 109 Ds 110 Rg 111 Cn 112 Uut 113 Fl 114 Uup 115 Lv 116 Uus 117 Uuo 118 Ce 58 Pr 59 Nd 60 Pm 61 Sm 62 Eu 63 Gd 64 Tb 65 Dy 66 Ho 67 Er 68 Tm 69 Yb 70 Lu 71 Th 90 Pa 91 U 92 Np 93 Pu 94 Am 95 Cm 96 Bk 97 Cf 98 Es 99 Fm 100 Md 101 No 102 Lr 103 Ni 28 Pd 46 Pt 78 Cu 29 Ag 47 Au 79 Zn 30 Cd 48 Hg 80 Ga 31 In 49 Tl 81 Ge 32 Sn 50 Pb 82 As 33 Sb 51 Bi 83 Se 34 Te 52 Po 84 Br 35 I 53 At 85 Kr 36 Xe 54 B 5 Al 13 C 6 Si 14 N 7 P 15 O 8 S 16 F 9 Cl 17 Ne 10 He 2 Ar 18 Rn 86 DÁSKALOS CHEMISTRY INTERACTIVE SCIENCE TEACHER FOR AUGMENTED REALITY SAMPLE TEACHING MATERIAL http://prefrontalcortex.de/labs/daskalos/periodicSystem.pdf