FOR THE FIRST MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~ N Nitrogen 3 T P Phosphorus 6 H U Uranium 3 A K Potassium 3 T AR Argon 3 G PU Plutonium 8 U LA Lanthanum 7 M PR Praseodymium 8 Y OS Osmium 1 O GA Gallium 6 U AL Aluminum 2 L MG Magnesium 7 I NI Nickel 4 K CL Chlorine 8 E Y Yttrium 5 I NA Sodium 1 S F Fluorine 8 E S Sulphur 3 L AG Silver 5 E PD Palladium 9 M MO Molybdenum 2 E ZN Zinc 3 N LI Lithium 3 T MN Manganese 6 N U Uranium 1 U Y Yttrium 7 M CO Cobalt 3 B O Oxygen 5 E B Boron 3 R SR Strontium 2 T C Carbon 5 O CA Calcium 3 L NE Neon 2 E N Nitrogen 3 T KR Krypton 5 T HE Helium 2 E FE Iron 2 R HE Helium 7 (uh, oh -- past the end of the word!) MG Magnesium 10 (uh, oh -- past the end of the word!) H Hydrogen 9 (uh, oh -- past the end of the word!) LI Lithium 8 (uh, oh -- past the end of the word!) NA Sodium 7 (uh, oh -- past the end of the word!) NE Neon 5 (uh, oh -- past the end of the word!) H Hydrogen 9 (uh, oh -- past the end of the word!) LI Lithium 8 (uh, oh -- past the end of the word!) NA Sodium 7 (uh, oh -- past the end of the word!) N Nitrogen 9 (uh, oh -- past the end of the word!) SC Scandium 9 (uh, oh -- past the end of the word!) AL Aluminum 9 (uh, oh -- past the end of the word!) FOR THE SECOND MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~ Take the last section, the ones that do not index correctly, and use the element's number within the periodic table as an index into the alphabet: HE Helium 2 B MG Magnesium 12 L H Hydrogen 1 A LI Lithium 3 C NA Sodium 11 K NE Neon 10 J H Hydrogen 1 A LI Lithium 3 C NA Sodium 11 K N Nitrogen 7 G SC Scandium 21 U AL Aluminum 13 M