33 29 30 31 32 34 35 36 28 21 22 23 24 25 18 19 20 26 27 Data Table 1. Properties of Elements with Atomic Numbers 1-36 Symbol Electron Configuration 8 9 10 11 12 13 14 15 16 17 Atomic Number 1 2 3 4 5 6 7 Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Element Magnesium Aluminum Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton S CI Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr H He Li Be B C N O F Ne Na Mg Al Si P 152 15251 192252 152s2p 132522P2 152252 2pp 152252204 152 252 25 152 252 2p6 152 252 206351 152 252 2p6352 152552206352301 15225263523p2 152252p6 352 jp3 Periodic Trends Activity 1st lonization Energy (kJ/mol) Atomic Radius (pm) 37 so 152 88 77 70 66 64 70 186 160 143 117 110 104 99 q4 231 197 160 150 135 125 125