ocr: - 18 2 13 14 15 16 17 He 4 7 8 9 10 J Be LE N F Ne 11: 12 Key To Colour Codes 14 15 16 17 18 Na Mg 3 Si JP - , CI Ar 19 20 21 22 Hydrogen Alkali metals E2 33 34 35 36 K Ca So Ti Ge AS Se Br Kr 37: 38 39 40 Alkaline earth Transition metals 50 51 52 53 54 Rb Sr Y Zi metals Sn Sb Te I Xe 55: 56 57 T Lanthanide metals Actinide metals 82 83 84 85 86 - Ba La a IHI D Pb Bi Po At Rn 87: 88 89 104 Fr Ra Ac WUT Boron family Carbon family Nitrogen family Oxygen family 68 69 70 71 Er Im Yb Lu 90 100 101 102 103 Halogens Rare gases Fm Md No Lr
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